DVD disc will not start. Troubleshooting DVD player type “No disk”, “Error”

As practice shows, most computer components are quite resource-intensive. They are able to operate normally and stably, without any breakdowns, for a long time. This fact confirms a large number of computers assembled fifteen to twenty years ago and still working today. Yes, of course, the performance of such a computer is very low by today's standards and it is simply not enough, even for standard office tasks.

Most components personal computer They quickly become obsolete and have to be replaced with newer and more powerful ones, but at the same time the old parts are quite functional. But there are also components that are relevant for a much longer time, but have a shorter service life - these are components such as a hard drive, although they are increasingly being replaced solid state drive, and also these are all kinds of drives for writing and reading, in particular CD and DVD drives.

Of course, most have simply forgotten what disks are, how to use them, and why they are needed, but at the same time there are people who have a large amount of the data they need stored on various disks. In addition, they most likely have a special drive installed in the computer, which is designed to read and write information to the disk.

Unfortunately, due to the fact that people usually do not change drives after upgrading their computer, but leave the old one in order to save money and use it very rarely, it soon simply fails and stops working. Unlike all other PC components, this one can break at the most inopportune moment.

Why do drive failures occur?

The search for the cause of the breakdown should not begin with the drive itself. It can stop working for many reasons, you need to check everything, and only then go for it. extreme measures. In any case, you can try to restore the old one, because you won’t mind spoiling it, or even breaking it.

Problems can be of a really different nature; the method, as well as the cost of the upcoming repair, depends on them. All problems associated with the operation of the drive are divided into two main types:

• software problem;
• hardware problem.

Each type can be classified as great amount various problems, they can be associated both with the quality of the equipment and with the actions of the user.

From this it is clear that if it doesn't work dvd drive on the computer, then there can be many reasons, so you’ll have to figure it out and look for specific reason malfunctions.

Then you can try to fix it on your own.

In any case, if cd drive not working the first action you need to perform is to remember your latest actions, because the problem often lies precisely in this.

In most cases, the problem is the user himself, who changes some settings that he should not touch at all. Due to poor knowledge in this area, he cannot understand why this happened.

Naturally, you need to search for the cause from the software part, because identifying a problem related to software is much easier; this does not require any special knowledge, actions or skills.

Finding and solving a software problem

If cd drive not working or DVD discs, then, as stated above, you need to remember what actions were performed on the computer during Lately. It is possible that the problem is related to the installation of new software that uses the drive or is somehow related to storage devices connected to the PC.

It is especially worth paying attention to programs that can emulate virtual disk drives. Often these are the causes of the malfunction.

In particular, it is worth considering programs for writing information to disk. The most common are Alcohol, Daemon Tools and Nero. Of course, problems should not arise with new versions of these programs, but it is still worth making sure that they are not the culprits, but some other reasons.

• We remove all programs related to the operation of disk drives or other reading and writing devices. You need to pay attention to all programs installed during the last period. Of course, you can leave the software with which the drive worked normally, but it’s still better to play it safe and check absolutely everything.
• When all the software that could interfere normal operation deleted, you must restart your computer. Also, if the drive does not work or does not work correctly, then you should return to the restore point, or roll back to previous state systems.

If all necessary actions carried out, but still cd drive not working, That:

• It is necessary to clean up all the “tails” of programs. There may be devices in Device Manager whose software has already been removed. It also turns out that their drivers remain, you just need to remove them by clicking right click mouse, going to properties, you can find the “Delete” button. After this, you need to reboot the device.
• Let's assume the problem remains. It cannot be solved by reinstalling the operating system and even if you boot using a Live CD ( bootable flash drive with the operating system), then the drive cannot be used, then the problem must be looked for elsewhere. First, you need to look in the BIOS to see if the drive is detected at all. One argument “ cd drive not working” is not enough. We need to find exactly what the reason is.

How to understand whether it is detected or not? If in the Boot tab in the BIOS there is a device with a name similar to the make and model of the drive, then it turns out that it is detected. If you can’t find something like this, then the problem is definitely in the drive itself.

Finding and solving hardware problems

The most simple repair there will be a replacement cable, depending on how old the PC is, it could be IDE or SATA. And also check the power supply to the drive. It is quite possible that the repair will end there; over time, the contacts may oxidize or the pressure of the connector or plug itself may weaken.

It’s strange to ask the question “ Why doesn't the DVD drive work on my computer?”, if no one has used it for several years. IN system unit A huge amount of dust accumulates, many people know about this and have even personally seen it. In the same way, dust accumulates in individual components, in particular in drives. The most dangerous thing is when dust gets on the laser and prevents the information from being read from the disk.

A how to check sd drive for dust pollution? The only one the right way- take it apart. But this must be done with extreme caution, since in its structure this component has a large number of small wiring and all kinds of cables, it is very easy to break them, and, unfortunately, not everyone can restore them.

In general, there are several options to check:

• as mentioned above - disassemble;
• blow out with a can of compressed air;
• buy a cleaning disc and insert it into the drive;

If you still manage to carefully disassemble the drive, you need to clean the lens using some soft, but not lint-free, cloth or a cotton swab. This must be done with extreme caution, as it is very easy to damage the laser. You can moisten cotton wool or a rag in advance in purified gasoline, alcohol, or even plain water. There should be a small amount of them, just moisten them a little for the best effect.

But, unfortunately, not everyone can take it apart, and most importantly clean it and put it back together. In this case, a special device – a cleaning disc – can help. He is regular disk with brushes attached to the laser area, which allow you to clean the laser optics from dust.

But it’s worth paying attention to this same cleaning disc, because there have been cases of laser damage due to overly hard brushes. They should be sufficiently soft and flexible, it is advisable that some kind of lubricant be applied to them. This will help save the laser from scratches.

The most the easy way It will be possible to blow it out with a compressed air cylinder without disassembling the drive. If you're lucky, you'll be able to blow off the dust from the laser and the drive will be able to read discs again.

Conclusion

It is worth noting that you can try to update the drive firmware by downloading it from the manufacturer’s website and following the instructions. But most common problem failure is precisely a dying laser. This may be due to poor quality materials or improper operation of the device, but leads to its replacement. Because repairing such a device will be much more expensive than buying a new or used one.

Based on this article, it became clear how to check the sdrom for functionality, how to find the cause of its malfunction and how to eliminate it. If you have straight hands and at least a little experience in using a computer, you can fix the problem yourself.

There are many reasons why disk drives stop working: driver problems, conflicting applications, damaged drives. To fix a problem, first determine the source of the problem.

1. The problem is in the storage medium

If there are many scratches on the surface of the storage device, the media will not be recognized by the drive. There may also be difficulties reading discs from certain manufacturers. For example, not all disk drives will analyze L-PRO products. In this case, buy products from a different brand.

2. The disk drive does not see the disk on the laptop

When the data reader does not recognize the discs, the laser emitter is faulty. Try disassembling the device and wiping the laser head with cotton wool.

Alternatively, connect the drive to another computer. This way you can check which element of the product is not functioning properly.
To process information, the drive uses different types modes. If one of them does not work (does not receive power or power), then the disks are partially and not always recognized. For example, the drive ignores CDs, but opens and reads DVDs.

Usually the main reason for product failure is wear and malfunction. laser head. Only replacing the device will help here.

3. The laptop drive does not see the disk. What to do?

In addition to mechanical failure, malfunctions may occur operating system. If the reading device recognizes disks with information as blank, update the drivers. To do this, go to Device Manager, remove the controllers and reboot the laptop. After turning on the PC, it installs itself software and will restart.

If nothing helps, download the drivers to the flash drive from the official website of the equipment manufacturer.

Please note: virtual emulators like alcohol or daemon tools . Uninstall such programs and remove the reader controllers.

4. The drive is working, but disabled in BIOS

You need to go into the BIOS and turn on the drive. The line responsible for inclusion looks like this: “CD-ROM. ENABLED" and "DVD-ROM. ENABLED".

5. Laptop drive cannot be read

If the previous steps did not help and the drive does not appear, then either it or the controller on it is broken. motherboard. The product needs to be replaced with a new one.

6. No access to recorded files on the disk

This problem is a number of system ones. Since it is responsible for the launch and operation of files software, which means the drive is functioning normally.

Update recording applications (Nero, Roxy) to the latest version on the official website of the developers or reinstall the software.

Note

If you have installed utilities that identify disk data after installation in the tray (similar to NERO StartSmart, Roxio InCD), remove applications and the drive from Device Manager.

17 792

Laboratory work No. 4

Topic: Disk drive (drive)

Goal: To know the insides of the drive, how it works, DVD discs.

Explanation of the work.

CD-ROM drive device.

CD-ROM drive is a complex electronic-optical-mechanical device for reading information from laser disks. A typical drive consists of an electronics board (sometimes two or even three boards - a spindle control circuit and an opto-receiver amplifier separately), a spindle assembly, an optical read head with a drive for its movement and disk loading mechanics.

A typical drive consists of an electronics board, a spindle motor, an optical readhead system, and a disk loading system. The electronics board contains all the drive control circuits, the interface with the computer controller, interface and output connectors sound signal. Most drives use a single electronics board, but some models have separate circuits on small auxiliary boards.

Spindle assembly (the motor and the spindle itself with the disk holder) are used to rotate the disk. Typically the disk rotates at a constant linear speed, which means that the spindle changes speed depending on the radius of the track from which this moment reads the information from the optical head. When moving the head from the outer radius of the disk to internal drive must quickly increase the rotation speed by approximately doubling, so the spindle motor requires good dynamic response. The motor is used for both acceleration and deceleration of the disk.

The spindle itself is fixed to the axis of the spindle motor (or in its own bearings), to which the disk is pressed after loading. The surface of the spindle is sometimes covered with rubber or soft plastic to prevent the disc from slipping, although in more advanced designs only the upper clamp is rubberized to increase the accuracy of the disc being installed on the spindle. The disk is pressed against the spindle using the upper clamp located on the other side of the disk. In some designs, the spindle and clamp contain permanent magnets, the attractive force of which forces the clamp through the disk to the spindle. Other designs use coil or flat springs for this purpose.

Optical head system consists of the head itself and its movement system. The head contains a laser emitter based on an infrared laser LED, a focusing system, a photodetector and a pre-amplifier. Focusing system It is a movable lens driven by an electromagnetic voice coil system, similar to the movable loudspeaker system. Change in tension magnetic field cause the lens to move and refocus the laser beam. Thanks to its low inertia, such a system effectively tracks the vertical runout of the disk even at significant rotation speeds.

Head movement system has its own drive motor, which drives the carriage with the optical head using a gear or worm gear. To eliminate backlash, a connection with an initial voltage is used: with a worm gear - spring-loaded balls, with a gear - pairs of gears spring-loaded in opposite directions. The motor used is usually a stepper motor, and much less often a brushed DC motor.

Disc loading system There are three options: using a special cassette for the disk (caddy), inserted into the receiving niche of the drive (similar to how a 3" floppy disk is inserted into the drive), using a retractable tray (tray), on which the disk itself is placed, and using a retractable mechanism. Systems with Tray usually contain a special motor that allows the tray to extend, although there are designs (for example, Sony CDU31) without a special drive, systems with a retracting mechanism are usually used in compact CD-Changers for 4-5 discs. and necessarily contain a motor for drawing in and ejecting disks through a narrow charging slot.

On the front panel The drive usually contains an Eject button for loading/unloading a disc, a drive access indicator, and a headphone jack with an electronic or mechanical volume control. A number of models have added a Play/Next button to start playing audio discs and switch between audio tracks.

Most drives also have a small hole on the front panel for emergency removal of the drive in cases where in the usual way this cannot be done - for example, if the tray drive or the entire CD-ROM fails, if there is a power failure, etc. You usually need to insert a pin or a straightened paper clip into the hole and gently press - this unlocks the tray or disk case, and it can be pulled out manually (although there are drives, for example Hitachi, in which you need to insert a small screwdriver into such a hole and rotate it located behind the front drive panel axle with slot).

Principle of operation DVD drive

What does it consist of?

1. All you can see without opening its case is the tray, which plays the role of a sliding tray where you insert the disk so that the drive can begin working with it later.

2. Hidden in its vast part is a motor that forces the tray to move out of its garage (hull) and then return to old place, regardless of whether it is empty or with content - a disk.

3. A motor, thanks to which the disk rotates around its axis to the speed declared by the manufacturer. For example, if it is a regular disk type - CD, the reading speed can reach 52X and higher.

4. A motor that allows the structure on which the drive laser is located to move.

5. Board - playing a major role in operation. A kind of computer that receives the master’s commands and forces them to be executed by the other components listed above, in order to then turn to the master again and send him the result of its actions.

How does it work?

1. The very first thing the drive does after a disk has been placed in it is trying to read data from it. To do this, he uses all of the above components, but the first of them is the tray and its components.

2. Then the design comes into play, which is driven by the motor from point 4, where we describe what the drive consists of. It contains a laser that emits a “beam of light.”

3. The light beam, thanks to a special “guide prism” and its other components, penetrates the surface of the “reflecting mirror”, which, due to the subsequent movement of the structure with the laser, reflects it onto the surface of the inserted disk.

4. When the beam reaches the target, it is reflected again, but from the very surface of the disk. The beam reflected from the disk again appears at the “reflecting mirror”. And here the guiding prism comes into play again, with the help of which the resulting beam penetrates the “photosensitive device” that generates electrical impulses.

5. The final stage can be considered “chewing” the received information by using microcircuits, which in turn send the received data to the computer, or receive it, and, depending on the type of command, get to work.

DVD capacity (layers and sides)

There are currently four main types of DVD discs, classified by the number of sides (single- or double-sided) and layers (single- and double-layer).

· DVD-5 - single-sided single-layer disk with a capacity of 4.7 GB. Consists of two substrates connected to each other. One of them contains a recorded layer, which is called the zero layer, the second is completely empty. Single-layer discs typically use an aluminum coating.

· DVD-9 - single-sided double-layer disk with a capacity of 8.5 GB. Consists of two stamped substrates connected in such a way that both recorded layers are on the same side of the disc; on the other side there is an empty substrate. The outer (zero) stamped layer is covered with a translucent gold film that reflects laser ray, focused on this layer, and transmits the beam, which is focused on the lower layer. A single variable-focus laser is used to read both layers.

· DVD-10 - double-sided single-layer disk with a capacity of 9.4 GB. Consists of two stamped substrates connected to each other by their back sides. The recorded layer (zero layer on each side) is usually coated with aluminum. Please note that this type of disc is double-sided; The reading laser is located at the bottom of the drive, so to read the second side the disc must be removed and flipped over.

· DVD-18 - double-sided double-layer disk with a capacity of 17.1 GB. Combines two recording layers on each side. The sides of the disc, each formed by two stamped layers, are joined together with their backs facing each other. The outer layers (layer 0 on each side of the disc) are coated with a translucent gold film, the inner layers (layer 1 on each side) are coated with aluminum. The reflectivity of a single-layer disk is 45–85%, and that of a two-layer disk is 18–30%. Various reflective properties are compensated by the circuit automatic adjustment gain (AGC).

Control questions:

1. What is a disk drive for?

2. What does a disk drive consist of?

3. How the drive works

4. What drive companies do you know?

5. DVD capacity

Related information.

If your DVD player is broken, you don’t have to throw it away or take it to a workshop and pay money for repairs. You can disassemble and even repair the device yourself.

Design and principle of operation of a DVD player

The player consists of a body with a tray for loading a disc. On the front panel of the case there are: a status display, player control buttons, some models may have connectors for connecting a microphone, headphones, or flash drive. Inside the case everything is much more interesting.

Briefly about the main components of the device.

CPU

This is the main element of the player. It consumes electricity from pulse block nutrition.

Laser reading head

It is used to read information from the media. A wide flexible cable connects the reading head to the base board. All disk media have the installation track necessary for proper operation. It is located in the center. When a disc is loaded, the laser moves toward the center to read that track. If the reading was successful, the presence of the disc is established, and only after that the rotation motor is turned on and the disc begins to play.

Spindle drive motor

The motor interacts with the processor through the driver. The disk rotation speed depends on the processor signals.

Driver

This is a microcircuit that receives commands from the processor and controls the operation of the spindle drive motor, the laser lens focusing coil, the laser reader movement motor, and the tray loading and unloading motor.

Scheme DVD player

Is it possible to repair it yourself?

“So many devices and wires! I’d better take it to the workshop!” - you say in horror, clutching your head. But! Don't rush to spend money. There are some breakdowns that can be easily identified and repaired using a regular screwdriver.

If the player does not turn on

There could be many reasons for this. Let's look at the most basic and common ones. Let's remove the player's cover and check the power cord for internal damage. To check the operation of the multimeter, turn it on in resistance measurement mode. We connect the probes to each other. If the device is working properly, zeros will appear on the display. We connect the open probes to the cord. One probe to the cable contact at the junction with the board, the other to one of the plug contacts in turn. If the ohmmeter gives up to 3 ohms, the wire is without damage. If more, then there is a break in the core and the cord must be replaced. If the multimeter does not react at all, it means that the contact on the plug and on the opposite end do not belong to the same core electric wire. It is not recommended to use the multimeter in continuity mode, as it operates in the range from 0 to several hundred ohms. The next step is to inspect for dust and swollen capacitors. We remove dust and replace capacitors. If no visual faults are found, and replacing the wire does not change the situation, take the player to a workshop.

The video below shows how the multimeter works.

How to ring a wire

If the discs are not readable

Let's look at the main causes of breakdowns and how to deal with them.

Head fault

Reasons: the laser head is dirty or the laser is out of order.

The contaminated head is blown out with compressed air using a regular rubber bulb. The lens lens is wiped with a cotton swab moistened with alcohol. Solvents must not be used. You need to wipe very carefully with light movements. If cleaning is not enough, the head must be replaced.

Cleaning on video

Replacing the laser head

Malfunction of the connecting cable

The train often breaks at the folds. We disassemble the player in the same way as when servicing the laser head. Carefully remove the cable from the plugs. Let's take a look. If there are visible breaks along the edges, and you do not want to change the cable completely, we make preliminary repairs. We cut off the damaged area with scissors. We remove the insulation layer with a knife or blade so as not to break the metal strips. If you can’t do it neatly, you can try to remove the insulation with a medical needle or fine sandpaper. The width of the removed layer should be the same as that of the cut piece of the train. We remove the blue plastic end plate from the trim and similarly glue it to the updated edge of the cable using super glue.

Restoring a cable on video

Now that the cable visually appears intact, we call its contacts. We attach one probe to the contact at one end, and the other one in turn to all contacts at the other end. We do the same on the other side of the loop. Each contact must call one contact on the other side. If the contact calls with several, then in the loop short circuit. If the contact does not ring with any other contact, then there is a break in the loop. In both cases, the cable cannot be used. It needs to be replaced.

Engine malfunction

If the motor rotates unevenly or does not rotate, it must be replaced along with the nozzle.

Replacing DVD Motor to Video

If the tray does not open

When the player's cover is removed, turn it on and press the disc eject button. Since the tray itself is not able to extend, you need to push it slightly. But do this carefully so as not to get an electric shock. The lid will slide out and disconnect the player from the network. Take a stick with cotton wool and moisten it with alcohol. We wipe the tray rails. We press the button. If the problem is not corrected, unscrew the necessary screws, remove the strips, plastic covers and get to the belt.

We change the belt and put everything back together. The video below shows detailed replacement computer drive belt. We work similarly in a DVD player.

Cleaning, lubricating, replacing the belt

If the player does not see the flash drive

Most flash drives are natively NTFS formatted. You need to insert the flash drive into the computer, copy necessary information on HDD, right-click on the flash drive and select “Format”. Next, select the FAT 32 format, agree that all data will be lost and click ok. If the DVD still does not see the flash drive, then the problem is in the electronics: perhaps the microcircuits are damaged or the power supply in the wires or cables is interrupted. It's worth turning to professionals.

Is it possible to flash a DVD player?

Updating your device will not solve all your problems. You can Russify the player with firmware. He will produce films bigger size, errors in reading supported formats will be eliminated. But the player will not be able to read formats that were not previously supported. Therefore, if the device works without lags, do not update it.

In order to find out whether it is possible to flash your DVD player, you need to carefully read the device model on back cover. Go to the manufacturer's official website and look at the firmware for this model. If they exist, then download them latest version to the computer, burn it to CD. We launch the disc in the player. When the update is complete, the initial splash screen will appear on the TV or player screen, and the disc tray will automatically eject.

Complex breakdowns

In addition to problems that can be corrected by any user who knows how to use a screwdriver and pliers, there are no less common, but more complex problems:

• The display backlight does not work;
• sound distortion;
• no picture or sound;
• no picture or sound;
• Karaoke mode does not work;
• no color image;
• complex mechanical damage, including water ingress;
• failure of the power controller;
• failure of microcircuits.

There are many manufacturers of DVD players. The operating principle and basic elements of the devices are the same. That's why turntable repair different manufacturers similar. If you want to try to repair the player yourself, go for it. Perhaps you will succeed, and you will be able to help your friends another time. Or maybe you’ll like it so much that you’ll get into radio engineering and open your own business.

Over time, the disk drive of a computer or laptop simply refuses to read discs. Sometimes this applies only to individual discs or types of media (for example, the drive reads all discs except DVD-R or CD-RW), and sometimes absolutely all discs remain unread - the drive simply does not want to work with them. There may be several reasons for such a drive “strike”. Below are the most common problems, why and solutions.

First, you need to decide whether the drive has stopped working on a particular disk or is not reading everything you offer it. If it stubbornly refuses to read only one disc out of all those offered, check it for scratches, abrasions, etc. mechanical damage- perhaps the reason lies in the disk itself, and not the drive.

If the drive served you faithfully for several years and only then stopped working correctly, it may simply need cleaning of the optical lens, which is responsible for reading information from the media. In order to clean it, you can use it, but it is advisable to contact a specialist who will not only clean the lens by disassembling the drive, but also rid it of dust and other contaminants that have gotten inside the device during its operation.

However, sometimes it happens that a new or practically new drive refuses to work. Why doesn't the drive read discs in this case? Disk drive problems can occur for a variety of reasons. First you need to check whether the cable connecting the drive to the drive is damaged. motherboard. If damaged, this cable may become main reason problems. If no visible damage is found, you can still try connecting the drive to the motherboard using another cable.

If the drive refuses to respond to user commands at all, you can try removing the device from the system and installing it again. To do this, go to “System Properties”, select “Hardware” and, having found required device, delete it. After this, you need to restart the computer so that the system can again detect the drive and install everything on it necessary drivers. Most often, after this manipulation, the drive starts working. But there are other answers to the question why the drive does not read discs.

Sometimes the reason why a disk drive fails to function normally is the appearance in the system of so-called virtual drives using programs that help the system read disk images stored on the computer. If the drive stops working after installing one of these programs (for example, Virtual CD or Alcohol 120%), you can try completely removing it and see if it works after that.

Sometimes searching for an answer to the question of why the drive does not read discs can lead to a sad result - it turns out that the drive board has simply burned out. Therefore, even before purchasing of this device It is advisable to find out for yourself which drive is the best of all those offered on the market. To do this, you can consult with specialists or read specialized forums in the Internet.

In some cases for further work If the drive doesn't read, it's enough to reflash it. Detailed description This procedure, like the firmware itself, can also be found on the Internet. The main thing to remember is that after unsuccessful firmware the drive can simply be thrown away, so you should approach this process with all seriousness.

These are just the main points why the drive won't read discs. If your problem does not fit any of the points described above, it is best to seek help from a specialist.