Stuck on the google nexus 7 logo. Problem: the tablet does not charge or the battery drains quickly

It was new, everything worked very quickly on it. The response to clicks and touches was immediate. Then I began to notice that applications took a long time to launch, the keyboard for input came out after a minute, in general, the tablet slowed down and it became impossible to use the device. What should I do, should I buy a new one?

When I finally got tired of this braking, I decided to figure it out. The first thought is that new versions of Android, which are regularly automatically installed on the tablet, simply require more modern hardware. As it turns out, this idea is wrong and there is no need to buy a new tablet! Everything slows down for a completely different reason.

The fact is that memory space is divided into areas. For example, there is a zone for user files, service files, etc. For the sake of simplicity, I won’t go into details, it’s enough just to know that there is a special memory space where the operating system puts cache files for quick access and speed up work, just so that it doesn’t slow down. When an update arrives, files from the new operating system are added there. For example, if there were three OS updates, then cache files will be stored there for all three versions. But for older versions, which we no longer use, these files are no longer needed, but they are still there.

So, the memory area, which is designed to improve performance, is cluttered with unnecessary files from older versions of Android. Naturally, instead of increasing speed, degradation occurs and the tablet slows down more and more. We should erase them. But the regular menu does not have such items and buttons. But there is a service menu where you can painlessly go and delete these files, the main thing is to know how.

How to access this special service menu? First you need to turn off your Nexus 7. Then press the power and volume down buttons at the same time. If the tablet starts to boot as usual, it means you pressed the wrong button. If everything is correct, the tablet will start in a special mode and display the following image:

A robot is drawn with an open lid. At the top you can see a menu with the word Start. You need to use the volume keys to move this menu to the Recovery Mode position and press the power button (it appears here as OK). After this, the menu will disappear, and the message “No command” will appear next to the robot:

Here the tablet awaits a command from us. It is introduced in a very interesting way, be punctual and careful here. You need to simultaneously press the power and volume up keys and hold smooth 3 seconds. If you underexpose or overexpose, nothing will work. When you have waited 3 seconds, release the buttons, another menu will appear on the screen:

Here you need to select “Wipe cache partition”. Choose this item carefully, because there is another one next to it with the word Wipe. Press the power button and the process of erasing our cache begins. This process ends quickly, after 5 seconds, displaying a message in the lower left corner of the screen:

Next, in the same menu, select Power down, and the tablet turns off. You can turn it on as usual and evaluate the performance gain after loading. Your favorite Nexus 7 tablet will be as fast as when it was new!

Current versions of the software can be downloaded from 4PDA. http://4pda.ru/forum/index.php?showtopic=485455

In the evening the Nexus 7 2013 tablet froze, so I left it and went to bed, by the morning it was discharged, and after installing it on charge it always showed the loading picture. After a day of suffering, the problem was solved.
Googling for a minute
1) install firewood to work with the device in fastboot mode.
2) Unlock the bootloader (correct me if this is not necessary for the command described below)
3) Download the program to work via fastboot+adb.
4) Enter the device into Fastboot mode (when turning it on, first press and hold the power button, then after a second press and hold the volume down button)
5) Launch the console, make sure that the console sees your device: fastboot devices by entering this command, the serial number will be displayed.
6) Run the command: fastboot -w wait until it is executed, this will erase the user data and replace it with factory data.
7) reboot the device and wait on the splash screen for 30 seconds, after which it will turn on.
Which probably solves 99.99% of the problems, but the whole trouble was that the recovery also refused to start.

1. You need to install drivers on your PC. (8.82 MB), the version from Windows 7 fits Windows 10 without any problems.
2. I unpacked the files to C:\Android\Tools
Then go to the Windows command line with administrator rights.
3. Enter Fastboot mode (Hold down the power button and volume-up), connect USB.

C:\Android\Tools>fastboot devices (checks whether your device is connected, it should show)
08xxx060 fastboot

4. Unlock the bootloader, go to the directory cd C:\Android\Tools, after C:\Android\Tools> fastboot oem unlock
5. Upload the recovery file to the C:\Android\Tools directory and install custom recovery for your device
fastboot flash recovery twrp-3.0.0-0-flo.img

6. Try going into recovery
It didn’t work for me, it’s still the same eternal loading... I managed to force recovery with the fastboot boot twrp-3.0.0-0-flo.img command, but the tablet could freeze, go into recovery when trying to force shutdown (by holding down the shutdown button) or when next turn on, BUT I WENT IN THE SAME)

7. Next, it remains to install the OS, all options for nexuses are on the off site https://developers.google.com/android/nexus/images
But that was not the case... All attempts to install the OS through the SkipSoft ToolKit program or with the command
C:\Android\Tools> flash-all.bat (after unpacking the tgz archive, in which there is also an archive in which there are several files and a zip archive of the firmware, these several files and the zip archive (we will NOT unpack it) must be placed in C: \Android\Tools to other files)
Everything is fine, but not for me... as it turned out, the tablet refused to set them to failure, the eternal loading remained, and often the files did not load at all and the entire system weighed 14MB =(

8. I had to boot into recovery, after which the laptop saw the tablet as a storage device and I was able to upload a third-party OS image under TWRP recovery https://www.androidfilehost.com/?fid=24399994186366980 Bad_Boyz_Nexus_7_MMB29K_6.0.1_stock_systemless_rooted_TWRP

Installing this image allowed us to solve the problem of eternal loading, the tablet still showed the image from the Google download, but after a minute the download of OS 6.0.1 began, lasting about 7 minutes. Surprisingly identified as Nexus 2012 but it works :)
___________
Upd, now the touchscreen refused to work, as it turned out - a physical breakdown, I decided to open the tablet because after pressing it at the contact points of the cable, it turned on itself and responded to touches.

1. Using a plastic card (I used a Pokemon chip since my childhood), gently press the volume just below the rocker between the plastic cover and the glass, swipe it down, then up and through the top to the other side.
2. Turn off the power.
3. Open the latches on the bottom and top sides and carefully pull out the cable.
Surprisingly, it was in perfect condition. We put it back together in reverse order, rejoice)

The coming October is preparing several gifts for every green robot lover. First of all, we are talking about the long-awaited release of the updated version, the main features of which we already have. In addition, Google will traditionally present its vision of the ideal smartphone - Nexus 6. And, finally, a tablet, presumably produced by the Taiwanese company HTC. Despite the imminent announcement, the current tablet called Nexus 7 is still good. However, before purchasing it, you should find out about the problems that owners of this device often encounter. What are we talking about? Let's find out.

First of all, it is worth noting that the problems outlined below do not occur on all seven-inch tablets from Google. Be that as it may, evidence of their existence has been found more than once on various forums, and therefore it is vitally important to know about it before purchasing.

One of the most common problems with the 2013 Nexus 7 is that the auto-rotate feature intermittently turns off. This is especially common after updating to Android 4.4 KitKat.

Thus, users will not be able to enjoy watching movies in landscape mode. Moreover, many applications that run in this mode by default refuse to open from time to time.

What's wrong with my flash drive?

Many users complain that their tablet is not recognized by the computer as a USB drive. In other words, some owners cannot connect the device to a computer and simply download movies or music onto it, for example.

In some cases, this problem can be solved by entering an active password, but in others, more serious intervention will be required.

Autonomy is not for everyone

Here the situation is quite obvious: some Nexus 7 copies consume too much of their own battery power. This, by the way, is observed even when the tablet is in a locked state.

A more rare problem is the slow charging process.

Let's hang out

Some devices freeze right when the device is turned on. That's right, exactly when the proprietary animation of the Nexus line is shown on the display.

According to our colleagues from androidauthority, a factory reset can solve this problem.

Internet must be fast

Updating isn't always good. Many owners reported periodic disconnections of the mobile Internet, while the devices of others simply do not see the SIM card. If quickly entering and exiting offline mode does not help, you need to reset the device again.

Have you ever used this tablet, dear readers? What does it feel like?

I switched to Android 5.0 on my Nexus 7 (WiFi, 2012) as soon as the OTA update arrived. The disappointment was pure, 100%: the device ceased to be a work and play tool, becoming a simulator of humility and Zen: for example, while mail was switching from one mailbox to another, you could have time to meditate.
Therefore, I rolled back to 4.4.4 - it was as if an anchor had been untied from the tablet - everything became so fast (compared to 5, of course).
Google promised to fix everything in the next version (for the Nexus 7 2012 it was version 5.0.2), and the notification about this update constantly popped up on the tablet. But I remained steadfast.
And then 5.1 came out. And although Google promises to eliminate memory leaks only in 5.1.1, I still decided to switch to 5.1.
After installing the system (I installed not the OTA update, but the downloaded image via FastBoot), everything turned out to be approximately as I expected: slower than in 4.4.4, and faster and smoother than in 5.
However, disappointment also set in quickly. The tablet shut up quite easily, and applications stopped responding very often. The pair “Google Search - Google Chrome” was especially pleasing in this sense. The search froze immediately, and it took about a minute to wait to start entering a query. When entering a request, even switching the keyboard layout (I use a physical Bluetooth keyboard) took up to 3 seconds. After that, when trying to open search results in the browser, Chrome also froze. Searching a web page opened in Chrome also put the machine into deep thought. Often there was a suggestion to close the application, or wait if there was time.
I didn’t want to roll back to 4.4.4, so I decided to figure out what the tablet was doing and how to cheer it up.
I noticed that synchronization puts the tablet into a particularly pensive state. The device did not respond until it synchronized everything that was configured. Surely this can and should be corrected.
All synchronization options are available from the “Accounts” section. I have Google accounts set up (of course), Exchange (work email), IMAP (a couple of personal mailboxes), OneDrive, Facebook, VKontakte, LinkedIn, MS Office (it was a surprise to see this “account”), OneDrive.
Let's figure it out.

It is enough to sync Evernote once a day - and not once an hour, as was set in the default application - we change the settings accordingly.
I set my IMAP mail accounts to hourly synchronization (I don’t want to turn them off completely, and the system doesn’t offer a longer period). Mailbox synchronization is enabled.
The Exchange account is configured for active (active delivery) synchronization - this is necessary to use the tablet at work, which I do quite often when I'm away from the office. In addition, the calendar is synchronized. I don't sync Exchange contacts. You can develop a separate topic about the Exchange account. For example, you can use Microsoft Outlook and not configure synchronization. But at the same time you lose synchronization of calendars. That's why I abandoned Oulook and use the standard Gmail email client.
I disabled synchronization of Facebook, LinkedIn, VKontakte completely.
In addition to mail, the Google synchronization set includes the following: Gmail, Google Keep, Google Play Movies, Google+, Google+ Photos, Google Play Press, Play Books, Play Music, Audio search on Google Play (?), Google Fit data, Application data (?) , Drive, Documents, Google+ Downloads, Calendar, Contacts, Google+ Contacts, Presentations, Sheets.
Of all this wealth, I left only the necessary ones: Gmail, Google Keep, Drive, Calendar, Contacts.

The “Account History” settings allow you to configure the saving of application history, web searches, device searches, voice requests, as well as search and viewing history on Youtube. I disabled all these parameters as they were of little significance for my scenarios for using the tablet.

Next in Google settings are the service settings.
Google Fit (Again?!) - because. I don’t use any devices, so there was nothing to change at this point.
Play Games - here I disabled all notifications from games, and notifications from Google+.
Safety. There's an interesting point here. To free up some resources, I turned off location detection. But at the same time, remote search for the device will be unavailable (in case of its loss or theft). Now it’s up to you to choose what is more important to you.
I left Application Scan and Anti-malware enabled.
My location - as I wrote above, I turned it off.
Connected applications - this is where information is stored which applications you have given permission to access your data. Moreover, information about all applications to which you have ever given access is stored. Even if the application has been deleted for a long time, information about connecting it to your Google account is retained. In this section, I disabled those applications that I do not currently use.
Search and hints - in this section it makes sense to adjust Search on the tablet - leave those sections that you use. For example, I don’t need to search Google Books, Google Movies, and other online services. Here I left only the search for contacts and applications. But everyone chooses this for themselves. As I said, I turned off Google Now suggestions.
I left Advertising and Data Management unchanged.

Now you need to change the settings in the developer section. Close Google settings and return to Settings.
In Settings, go to the “About Tablet” section and click on “Build Number” seven times. After this, the “For Developers” section will open.
Here it is advisable to disable the animation options: “Window: Scale”, “Transition: Scale”, and “Animation Speed”.
Next, enable the “GPU acceleration (always use GPU for 2D drawing)” option.
We also turn on “Off.” apparatus. overlay (Always use GPU when composing screen)."
And then the “Background process limit” parameter. Installed 2.
What happened.
As a result, I received a completely responsive tablet from three years ago on the latest version of Android 5.1. I made this text along with screenshots on a tablet, and the work was quite comfortable.
True, there was confusion with Microsoft Word for tablets, apparently with a limitation on the number of background processes. If you had to open a third application, Word would lose your unsaved changes and prompt you to recover the lost file. WPS Office did not allow this, saving the latest changes.
The Google Search + Google Chrome combination has become much more responsive. It became possible to use the search without a long wait (although this process cannot be called fast either).
We draw a conclusion. The new ART virtual machine, which is installed by default in Android 5.x, is good at a large amount of fast RAM, which the old Nexus 7 (2012) cannot boast of. It was most likely that all the waiting time was spent on filling and cleaning the RAM, especially when I had to switch between applications. By limiting background processes, we prevent memory overflow and long uploads and downloads. By limiting the sync options, we allow the device to remain a little more responsive. Other settings, including hardware acceleration of 2D graphics, seem unimportant to me. But this statement can be confirmed or refuted only after serious measurements and experiments with the machine.
If I were Google, I would set gentle operating modes for “older” devices so that the impression of using the device would not be spoiled.
I will be glad if this is useful to someone. If anyone has any additions or corrections (after all, I’m not well versed in the internal structure of Android) - welcome!

In the category of compact Android tablets, the undisputed leader is the Google Nexus 7, released by Asus. The 2012 model was very popular, so in July 2013 Google decided to release an updated version of this tablet - Nexus 7 (2013), which received a higher display resolution, more RAM, a faster processor and camera. But along with the improvements, the tablet also had its own problems - in particular, with multi-touch and GPS, which we will try to figure out in this article.

Even though the tablet has received universal acclaim, we all understand that no product is perfect. That is why we have found for you a list of common Nexus 7 problems and tried to find suitable solutions for them. In this review, we discuss the problems with the updated version of the tablet, which was released in 2013.

Problem: the tablet does not see the SIM card or there is no communication signal

Several owners of Nexus 7 (2013) with LTE support have encountered a problem where the SIM card refuses to work. As a rule, this error is accompanied by the message “SIM card missing.” Sometimes the message “SIM card has been added” appears on the screen and prompts you to reboot. For some people, the network simply disappears, and the tablet does not report SIM card errors. Keep in mind that problems may arise if you insert a SIM card from a European carrier into a US-market tablet (and vice versa), because they use different channels.

Possible solutions:

Try rebooting your Nexus 7 by holding down the power button and ignoring the prompts; wait until the device reboots completely.

Lower the status bar and try turning offline mode on and then off again.

Try turning off your Nexus 7 and removing the SIM card; Make sure the card and slot are clean, then reinsert the SIM card.

Check with your carrier to find out what the hotspot name should be, and then go to [Settings > Wireless & Networks > More > Mobile network > Hotspot] to see if it's listed correctly on your Nexus 7.

If you have another SIM card, then insert it into the tablet to make sure that the problem is not with your SIM card.

Problem: When connected, the computer does not recognize the device

If you find that when you connect your Nexus 7 to a computer or laptop using a USB cable, the computer does not see it, then you are not alone in your problem. Fortunately, this can be easily fixed in the settings.

Possible solutions:

Go to [Settings > Memory], click on the “menu” button in the upper right corner and select USB computer connection. In the section that appears, make sure that the “Media device” item is checked. After this, try connecting the device to the computer again.

It is also worth trying to connect the tablet to a different USB port or using a different cable to make sure that the problem is not with them.

If none of this helps and your computer is running Windows 7, you can connect your tablet using USB, right-click Computer from the Start menu and select Device Manager. At the very top of the list that appears, you will see Asus Android Devices: by clicking on the arrow next to this item, you will see Android Composite ADB Interface - right-click on it and select “Update driver”... In the window that appears, select “Search for drivers on this computer ", then "Select a driver from the list of already installed drivers" and "USB Composite Device", then click "Next" to update.

Problem: camera doesn't work

There are several issues with the Nexus 7's camera. Some people have found that they can't switch to the main camera, while others have received the message "An error has occurred" when they try to launch an app. Can't connect to camera."

Potential solutions:

Restart your tablet while holding down the Power button.

Go to [Settings > Applications], go to the All tab and find the camera application. Tap Clear Cache and then try launching the camera app again.

In [Settings > Tablet info > Software update], make sure you have the latest updates installed.

Problem: Nexus 7 Boot Stops at Google Logo Screen

Many users have had trouble turning on their Nexus 7 tablet. As expected, they hold down the power button until the device starts up, the tablet turns on, the Google logo appears on it, or perhaps even a colored cross (an icon in the form of an iridescent letter X), but then The download stopped and the tablet froze with this screensaver.

Possible solutions:

First, try holding the Power button for 30 seconds (ignoring any pop-ups) and wait for the device to reboot.

If this does not help, then try resetting the settings (but note that this will cause you to lose all data stored on the device).

How to do this without starting the tablet:

If the tablet is turned on, turn it off.

Press and hold the Power button until the Google splash screen appears on the screen, then immediately press and hold the Volume Down button (without releasing the Power button). You will see the word Start inside a green arrow.

Double-click the volume down button to select Recovery mode.

Press the Power button to enter recovery mode. After this, on the tablet screen you will see an image of an android with a red exclamation mark.

While holding the Power button, press the Volume Up button.

Using the volume keys, navigate to the “wipe data/factory reset” option. To select it, press the Power button.

Scroll to Yes – erase all user data and press the Power button to select it.

Problem: Noise in the speaker

A certain number of Nexus 7 owners complain about noise, which often appears at low volumes. For some users, the noise does not go away even when the speaker is turned off.

Crutches:

Use headphones and forget about the problem. You can even plug in headphones to simply cut out the background noise from the speakers when in silent mode.

Use portable Bluetooth speakers.

Possible solutions:

Some people seem to have this problem with their tablet's brightness settings. Expand the status bar, turn down the brightness, and see if the speaker noise goes away.

Google should have fixed this issue with a new software update, so go to Settings > Tablet info > Software updates and make sure you have the latest updates.

Problem: Sudden reboot

Many users have encountered the problem of Nexus 7 (2013) suddenly rebooting. Users of the older Nexus 7 model were also familiar with this problem. Users of the new model report that the tablet reboots when using the Chrome browser, but the problem most likely is not limited to this.

Possible solutions:

An update may resolve this issue. The software should update automatically (it's a Nexus, after all), but you can check for the latest updates yourself. You can do this in the [Settings > Tablet info > Software update] menu.

Also make sure you have the latest application updates installed. The easiest way to check for these updates is to launch the Play Store, click on the menu button and select "My Apps". In the top right corner, you will see an option to Update All.

The problem may be an app that hasn't been optimized for Android 4.3, so if you notice an issue with the app, please send a message to the developer or find an alternative to the app. You can check whether the application is involved in device problems in .

You can also try a soft reboot. Hold the Power button for 30 seconds, ignoring any pop-up prompts, and wait until your device restarts completely.

If you still have problems with the device suddenly rebooting, then the only thing left to do is reset the settings to factory settings. Make sure you back up all your content (your Google Account will back up your data so you can restore it later). Press the Menu button and select [Settings > Backup & reset > Reset data > Reset device], then enter your pattern, PIN, or password if prompted. Finally, click “Delete All.”

If none of the above solutions help, then all you have to do is contact the service center.

Problems with multitouch

Several Nexus 7 users have complained that their new tablet registers erratic, multiple touches on the screen. Among other touch screen problems, it is worth noting that some users experience single presses on the touch keyboard as double or triple presses. If you are unsure about this issue with your touch screen, try installing the Yet Another MultiTouch Test app, which will allow you to visually check if the touch sensor is registering touches correctly.

Possible solutions:

The sensitivity of the touch screen may be affected by the protective film. Or perhaps you're used to a less responsive screen, so you press too hard or for too long on the new screen. Try changing the way you use the screen and see if the problem resolves.

This may be a software problem caused by a specific application. Try going into safe mode and check it. If the screen works fine in Safe Mode, then you need to restart your tablet and remove the questionable apps (or start uninstalling apps one at a time until you find the culprit).

The problem may be faulty hardware. If you notice strange screen behavior while using the Yet Another MultiTouch Test application, then you need to contact a service center.

Problem: GPS does not work or the signal keeps disappearing

It seems that many owners of the new Nexus 7 are having problems with GPS. For most users, the connection is established quickly and without problems, but after a few minutes, or when switching applications, the GPS signal disappears and is not restored.

Crutches:

It has been noticed that many people experience a similar problem when several applications using GPS data are running simultaneously. If, for example, you use Google Maps, then the GPS will work fine, but if you launch other applications that use your location data, the signal may begin to disappear. Therefore, you need to limit the number of applications running simultaneously that use GPS data.

If you simply restart your tablet by holding down the power button until the device starts up again (ignoring any pop-up prompts), the GPS will most likely work properly again.

Possible solutions:

Wait for a software update, Google is already working on a solution to this problem. You can check available updates in the [Settings > Tablet info > Software updates] menu. Also make sure your apps are up to date. To do this, you need to launch the Play Store, go to the menu (in the upper left corner) and, opening the “My applications” item, select “Update all”.

If you think this is a hardware problem, then you should contact a service center.

Problem: Screen flickering

Some users have noticed that the screen of their Nexus 7 (2013) tablet is prone to flickering. First of all, this is noticeable at low brightness.

Solution:

Expand the status bar and turn off automatic brightness adjustment. After this, make sure the brightness is set to more than 40%.

Possible solution:

The problem may also be due to a hardware error. You may even notice that at low brightness the screen goes completely dark. In this case, you need to contact the service center.

Problem: The tablet does not charge or the battery drains quickly

There may be two problems associated with the tablet's battery: for some users, the Nexus 7 (2013) refuses to charge, for others, the problem is related to the battery, which discharges faster than usual.

Solution:

If your tablet's battery is draining unacceptably quickly, it may be due to an app that isn't optimized for the latest version of Android. To test this theory, try booting your Nexus 7 into .

Possible solution:

If your Nexus 7 (2013) refuses to charge when plugged into an outlet using the original cable and charger, you will need to contact your retailer for a replacement device.

So far, these are all the detected problems of Nexus 7 (2013) and options for solving them. If you encounter another problem, then in the comments you can tell us about it - perhaps we can help you.