Advent Vega – Steps to flash a new ROM

I see often in the forums the questions of newbies about flashing a new stock or custom ROM. What steps are needed to be safe, how to backup data, ….. I will try to give here a short tutorial, maybe you have done already one of the steps, then just skip them. All of the following steps require that you have the proper USB drivers installed for the different modes your tablet can be. ADB driver and NVFlash recovery driver are needed. Check “YAUDIG[XP][VISTA][7] – USB driver guides, Yet Another USB Driver Install Guide” if you have any problems with USB drivers.

Another important information: Your tablet (as long as it is a Advent Vega, pov Mobii, Smartsurfer, XVision, UX100 or other compatible tablet) is nearly unbrickable. These tablets have a special recovery mode, called NVflash recovery. This recovery is never touched when you flash a new ROM and it has nothing to do with the ClockworkMod recovery. Whatever goes wrong, if you follow step 1 you will be always able to rescue your tablet.

1) Make a backup of your current ROM. And I do not speak about a Titanium backup or any other backup tool. I speak about a nandroid backup. A nandroid backup safes the current status of your tablet, including your apps, your settings, accounts, … This is not to reinstall your applications after you flashed a new ROM. This is just your safety belt in case anything goes wrong when you test custom ROMs. About saving and reinstalling your apps I will talk in step 2. There are 2 ways to do a nandroid backup:

1a) Backup with ClockworkMod recovery.

  • Get ClockwordMod recovery. Easiest installation is by “[mod] Clockwork recovery 3.0.2.4 [easy install] v2“.
  • After installation goto your app drawer and look for an app called Recovery. Start this app and your tablet will boot into ClockworkMod recovery.
  • In the ClockworkMod recovery select “backup and restore” then select “Backup”. This will create a full backup of your current system and data.
  • You can restore your tablet everytime to this status by either using ClockworkMod or with a tool called VegaFixer. I wrote a short review in my post “Your tablet is no longer booting?“. Just follow the instructions.

1b) Make a backup with the “OneClickRestorer“. This tool creates a full backup without the need to install ClockworkMod. It is working automatically from Windows or Linux. This solution seems to be easier, as it doesn’t require to install ClockworkMod recovery, but you will see that for some of the custom ROMs (like Cyanogenmod 7) you will need CWM anyway. So maybe a good idea to do step 1a) and make your backup with step 1b) if this is easier for you.

2) Backup your installed apps and settings (like Google account, …).

My prefered backup tool is Titanium backup, But it needs root to work, so you might need Visionary if you are on a stock ROM at the moment. Visionary will give you root access your device. Root access means that you get admin rights to do nearly everything (good and harmfull) to your system. Titanium Backup can make a full backup of your installed applications, settings, accounts on your SDcard. This is useful for a quick restore after you flashed a new ROM. However, there are some risks as well. Restoring systems settings from your old ROM on a new ROM might cause instability. I use it to restore apps and the settings for these apps only. System settings and accounts I restore manually.

A few words about applications you bought on Android market. There is not really a need to backup and restore bought applications. As soon as you have setup your Google account you can reinstall them from the market without paying again for them. Google offers as well automatic restore of the settings of these applications, but it never worked for me. Therefor I use Titanium backup to restore the settings for these applications.

3) Now you are ready to flash a new ROM. There are 3 different ways to flash your new ROM, depending on the ROM. How do you know which method to choose? You have to download the ROM you want to flash and check the contents of the ZIP file.

  • If you find some .img files and a batch file called lvds.bat in the ZIP file, then the ROM is flashed by method 3a)
  • If you find only folders inside the ZIP file and one folder is named META-INF, then the ROM is flashed by method 3b)
  • If you find folders and a batch files named install-windows.bat , install-linux.sh and install-mac.sh, then the ROM can be flashed by method 3b) or 3c).

Another tip: If you change between different ROMs (not an upgrade of a ROM) you MUST wipe data, cache and dalvik-cache. Failing in do so might end in boot loops or unstable devices afterwords.

3a) Through NVflash recovery. This method is mainly used by stock ROMs, but I used it for my own ROMs as well. No wipe is necessary here, as the complete tablet is wiped before the new system is flashed.

  • Unzip the ROM on your hard disk.
  • Switch off your tablet.
  • Attach power and the USB cable to your tablet.
  • Switch on your tablet with the following sequence:
  1. Press the back button and keep it pressed during all the time
  2. After 2 seconds press the power button (keep the back button pressed) until your screen backlight turns on and/or you hear on your PC that an USB device has been attached.
  3. Release the power button (keep the back button pressed).
  4. After 2 seconds release the back button.
  • Start the lvds.bat file in the folder you unzipped to ROM to. A window will pop up and give you information about the progress. If it says “Device not found”, you have either a USB driver problem (see the above link for help) or your tablet did not boot properly into the NVflash recovery. Try to switch off your device by holding the power button for 30 seconds to 1 minute and try the above sequence again.
  • After successful flashing the new ROM you have to switch on the tablet manually. It does not reboot automatically. Before switching on, wait 20 seconds. I saw that sometimes the tablet did not switch off immediately, instead I could here that the USB was disconnected, then connected again, the backlight went on shortly, and then the tablet powered down.

3b) Through ClockworkMod. This method is standard for most Android phones and tablets. It requires that you have ClockworkMod installed. See step 1a) above how to get CWM recovery installed.

  • Copy the whole ZIP file onto your SDcard. You can copy it to the root or into any folder.
  • Restart your tablet into CWM recovery mode with the application Recovery in your apps drawer.
  • If you install a different ROM than the one you used, “wipe data/factory reset”, “wipe chache partition” AND in “advances” “Wipe Dalvik Cache”. If you do not wipe, you might end up in boot loops or unstable systems with “Force close” of applications.
  • After your tablet booted into CWM recovery select “install zip from sdcard” then “choose zip from sdcard”. Select the ZIP file you want to install and start flashing.
  • After flashing is finished you can restart your tablet.

3c) Flash from Windows/Linux/MacOS through a batch file. The batch file should wipe your data and cache, so no explicit wipe in CWM recovery mode is necessary.

  • Unzip the whole ROM into a folder on your hard disk.
  • Make sure your tablet is switched on and has booted normal.
  • Make sure you enabled debug mode in “Settings” “Applications” “Development” “USB debugging” (Selected).
  • Start the batch file that supports your PC operating system.
  1. install-windows.bat for Windows XP, Vista, W7
  2. install-linux.sh for Linux
  3. install-mac.sh for MacOS.
  • A window will open and show you the progress. If instead of the progress you see an error message like “Device not found”, there are 2 possibilities:
  • You have not enabled USB debugging. Enable USB debugging and retry.
  • You have a USB driver problem. Check the link at the beginning of this post to fix your USB drivers.
  • After flashing the device will reboot.

Now hopefully you have your new ROM on your tablet. And if anything went wrong, you will see why step 1 is important. If after flashing your tablet hangs in a boot loop, or does not even show the boot animation or crashes permanently while you use it, then you need to restore your last stable status.

4) Restore your last working system version. In case your tablet is no longer booting or in bootloops, you have to use step 4a). In case the ROM booted, but crashes often, or you simply don’t like it, you can use step 4b) as an alternative.

4a) Tablet is not responding or in boot loops.

  • Switch off the tablet by pressing the power button for 30 seconds to 1 minute
  • Goto the folder where VegaFixer or OneClickRestore had saved your backup.
  • Attach power and the USB cable to your tablet.
  • Switch on your tablet with the following sequence:
  1. Press the back button and keep it pressed during all the time.
  2. After 2 seconds press the power button (keep the back button pressed) until your screen backlight turns on and/or you hear on your PC that an USB device has been attached.
  3. Release the power button (keep the back button pressed).
  4. After 2 seconds release the back button.
  • Start your restore to get back your working system. If you get an error “Device not found”, try again to switch off your device by holding the power button for at least 1 minute and make sure that you have the power plugged into the tablet. It took me up to 5 trials once before I got the tablet into NVflash recovery.

4b) In case you can still boot into CWM recovery and you have used step 1a) to make a nandroid backup you can restore the system through CWM recovery.

  • Reboot the device into CWM recovery with the app Recovery in the apps drawer (hopefully the ROM you installed had the app).
  • Here again it is a good idea to wipe data, cache and Dalvik-cache to avoid problems.
  • Once in CWM recovery, select “backup and restore” then select “Restore”.
  • You will see all available nandroid backups sorted by the date and time they were created.
  • Select the one you want to restore and let CWM do its work.
  • Restart your tablet and you should be back to your last working system including your data and settings.

Instead of CWM you can use as well ROM manager, this is an application that you find in some ROMs (like the CM7). It makes using the CWM recovery easier, but still needs the CWM recovery installed. It can install CWM recovery for you as well.

Hope with this tutorial you get successfull through your first ROM flash on your tablet.

Thanks to the members at XDA-developers and MoDaCo that wrote all the applications and tools that I mentioned here.

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8 Responses to Advent Vega – Steps to flash a new ROM

  1. Andrija says:

    i HAVE INSTALE VEGA COMB !:& BETA ON MY POINT OF VIEW MOBII 10.1;AND I STAR TE TABLET GO TO SCREEN LOCK AND I CANT PRESS THE SRCEEN;THE TOUCH SRCEEN FREZEZ And i cant press anything,i go to recovery mod i didt the 4 step and it cant,it shouts down,PLESE HELP

    • beegee1962 says:

      Get the original ROM from Advent Vega or pov Mobii and try the following:

      Switch off the tablet by pressing the power button for 30 seconds to 1 minute
      Goto the folder where you saved the original ROM (should be an .EXE file).
      Attach power and the USB cable to your tablet.
      Switch on your tablet with the following sequence:

      Press the back button and keep it pressed during all the time.
      After 2 seconds press the power button (keep the back button pressed) until your screen backlight turns on and/or you hear on your PC that an USB device has been attached.
      Release the power button (keep the back button pressed).
      After 2 seconds release the back button.

      Start .EXE file to get back your working system. If you get an error “Device not found”, try again to switch off your device by holding the power button for at least 1 minute and make sure that you have the power plugged into the tablet. It took me up to 5 trials once before I got the tablet into NVflash recovery.

      Be aware that if you boot into NVFlash recovery, there is nothing on the screen. It is all black, no image or text. You might see the backlight on, that’s all.

  2. rytmy says:

    It also works on the tablet Mobi Comp 7”3G?

  3. rilakos says:

    to all ppl U NEED THE USB CABLE THAT CAME WITH TABLET.
    it is essential as it is different to a market USB AM to AM cable
    read http://en.wikipedia.org/wiki/Universal_Serial_Bus
    (second table NS)
    my bought cable was 1-2-3-4 to 4-3-2-1 so i made 1 by hand

  4. David Huxley says:

    I have an advent vega. A month ago, a message came up to “update software” when the vega was on and connected to wifi/internet. I pressed OK and the whole thing has shut down on itself and I cannot get it to restart at all. The best I get is the backlight of the screen lights up a tiny bit. KnowHow at PC World know nothing and are no help – can anyone here tell me what I need to do to get it restarted please? Thanks

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