[A7 General] Destron5683:
Hi, I had a similar experience, the fix is not hard but will require a small bit of knowledge. READ THIS ENTIRE POST before you start and make sure you understand everything.

Also, make sure you using the correct firmware. There are two A7 tablets, the A7 and A7+ there is a note about it on the elocity webpage linked to below.

Your going to need a USB Type A to Type A cable like this, http://www.google.com/products/catalog?hl=en&safe=off&rlz=1C1CHFX_enUS462US462&q=USB+Type+a+to+type+A&gs_upl=&bav=on.2,or.r_gc.r_pw.,cf.osb&ion=1&biw=1600&bih=743&um=1&ie=UTF-8&tbm=shop&cid=4205110542916106536&sa=X&ei=xJ8DT9u1OuqYiAL9tMG5Dg&ved=0CD8Q8wIwAA

I know they are not easy to find and you may have to order one online. I personally did not have the time so I took two extra cables I had cut them in half and spliced the to Type A ends together.

Next your going to need to download the Tegra tools. Go here:

http://developer.nvidia.com/tegra-250-tango-development-kits

and scroll down and find Android 2.2 (Froyo) for Tegra 250 & Tango ONLY and download the version for your OS. I'm on Windows so that what Ill explain with. Once it is downloaded install it, taking note of install directory. Should be

C:\Program Files\Nvidia Corporation\

Now go here:

http://www.elocitynow.com/prod_a7_downloads.shtml

And download the firmware for your tablet.

Open Computer|My Computer and browse to:

C:\Program Files\NVIDIA Corporation\tegra_froyo_20110207\

in this folder backup boot.img, bootloader.bin, recovery.img, and system.img to a separate folder.

Find the update.zip you downloaded from elocity and extract it to this same directory.

Now download this flash.cfg file

http://www.mediafire.com/?rgzshkvw369dfdr

and copy it to that same directory.

Now that all setup, we are about ready to go. With your tablet TURNED OFF Plug your elocity tablet in to your PC with the A-A USB cable you either bought/made/or otherwise acquired, we will need to get the tablet in to APX mode.

Using a paper clip or other similar object depress and hold the reset button found on the back of the tablet in the small hole.

While holding the reset button turn the tablet on, (sometimes you can just hold power a min and it will come on, mine i have to hold it for about 5 sec, release, then press again) when the light is green release the reset button and power button at the same time. Without the screen this will be tricky, the only visual cue you will have is that your PC will detect the tablet and attempt yo install the drivers, which it will fail to do.

Once your PC gives you the notice that the drivers failed to install open the device manager and look for an entry labeled APX with a yellow exclamation point next to it. Right click on APX and choose update driver software, and choose browse my computer. Point the file selector to

C:\Program Files\NVIDIA Corporation\tegra_froyo_20110207\usbpcdriver\

and it should install the required driver for your tablet. If all went well it should now appear in the device manager as NVIDIA USB Boot-revovery driver for Mobile Devices under the Universal Serial Bus Controllers section.

Now click the start menu and in the search box type CMD and hit enter (or choose run on XP)

At the command promtp type the following:

cd\ <ENTER>

cd program files <ENTER>

cd nvidia corporation <ENTER>

cd tegra_froyo_20110207 <ENTER>

nvflash --bl bootloader.bin --download 6 recovery.img --download 7 boot.img --download 9 system.img <ENTER>

This will flash the factory firmware image to the tablet. If all went well your tablet should be fully functioning again.

UPDATE:

As a response from a PM I am adding this here... if you are trying to recover from a WRONG firmware flash (flashing A7 firmware to A7+)

The factory firmware flashes 4 files

recovery.img to SOS partition 6

boot.img to LNX partition 7

system.img to APP partition 9

bootloader.bin to EBT partition 4

So in other words it will replace your boot loader as well. In that event you will need to do this additional step to fix your bootloader:

nvflash --bl bootloader.bin --download 4 bootloader.bin

I suggest flashing the bootloader seperate from everything else in its own command. In my experience the A7+ will run on the A7 bootloader but recovery won't display a picture. So after you perform the above procedure ensure that you CAN access recovery before proceeding. Here is the entire partition table for the A7+

PartitionId=2
Name=BCT
DeviceId=18
StartSector=0
NumSectors=1536
BytesPerSector=2048

PartitionId=3
Name=PT
DeviceId=18
StartSector=1536
NumSectors=256
BytesPerSector=2048

PartitionId=4
Name=EBT
DeviceId=18
StartSector=1792
NumSectors=1024
BytesPerSector=2048

PartitionId=5
Name=NVC
DeviceId=18
StartSector=2816
NumSectors=256
BytesPerSector=2048

PartitionId=6
Name=SOS
DeviceId=18
StartSector=3072
NumSectors=4096
BytesPerSector=2048

PartitionId=7
Name=LNX
DeviceId=18
StartSector=7168
NumSectors=4096
BytesPerSector=2048

PartitionId=8
Name=MBR
DeviceId=18
StartSector=11264
NumSectors=512
BytesPerSector=2048

PartitionId=9
Name=APP
DeviceId=18
StartSector=11776
NumSectors=281600
BytesPerSector=2048

PartitionId=10
Name=CAC
DeviceId=18
StartSector=293376
NumSectors=204800
BytesPerSector=2048

PartitionId=11
Name=MSC
DeviceId=18
StartSector=498176
NumSectors=1024
BytesPerSector=2048

PartitionId=12
Name=ER1
DeviceId=18
StartSector=499200
NumSectors=256
BytesPerSector=2048

PartitionId=13
Name=UDA
DeviceId=18
StartSector=499456
NumSectors=632320
BytesPerSector=2048

PartitionId=14
Name=ER2
DeviceId=18
StartSector=1131776
NumSectors=256
BytesPerSector=2048

PartitionId=15
Name=SDC
DeviceId=18
StartSector=1132032
NumSectors=801280
BytesPerSector=2048

Good luck!