[MeMO Pad 7 Q&A, Help & Troubleshooting] johnkirchner:
Flashing Factory Image

The following instructions worked for me when trying to reflash the factory firmware for the ATT Asus MemoPad 7 LTE (ME375CL). I did originally try using the Asus Flash Tool and the raw firmware file (link below) but the tool said it could not unzip the package for some reason or another. So the steps below show how I did it using ADB with fastboot.

I ASSUME NO LIABILITY SHOULD THIS GO WRONG FOR YOU! However, it probably shouldn't matter if you are bricked, I doubt it will make it any worse :p Either way, I will not replace your tablet or be responsible for troubleshooting it should you mess it up more...

This scenario is based on the tablet stuck on the Asus boot screen and not going any further. I was trying some in depth rooting attempts and bricked it badly. I was then trying to install a custom recovery and that is why I could not reset it and bricked it.

PRE-REQS:

1. ADB installed - Download: https://drive.google.com/open?id=0B0fKccJIuWsna04wMjY1eG9YREU

2. Asus Drivers installed

3. Firmware - Download: https://drive.google.com/open?id=0B0fKccJIuWsnWGhwYzA0Vkluc2s (file is 1 Gb + in size, may take a bit)

SETUP:

If you already have a working ADB setup, do not download the one above. If you are using the one above, I extracted the folder into my C: drive, so the path for ADB would be C:\adb (to keep it simple and less typing).

MAKE SURE THE ASUS DRIVERS ARE INSTALLED! If you have plugged the tablet in to a pc before, they should already be there. Otherwise search, download and install the appropriate drivers.

INSTRUCTIONS:

Extract the firmware zip file to somewhere easily accessible like your desktop. In there, you should see the boot.img, recovery.img and system.img files, copy/paste those files to your ADB folder (for easier typing later on). There are also additional files like these but start with "unsigned_", do NOT use those!

1. Ensure you probably have at least 30% battery charge, I would still recommend more though.

2. Put the tablet in Fastboot mode by ensuring the tablet is completely powered down and then press/hold the VOLUME UP and POWER keys at the same time. When the Asus screen appears, let go of the POWER button but continue to hold the VOLUME UP button. Let go of the VOLUME UP button when the fastboot screen appears.

3. Plug the tablet in to the computer and then open a CMD prompt as administrator.

4. The following uses the ADB downloaded and placed in the folder as listed above, you may need to adjust the location path as needed if you already have ADB installed or located in a different path.

Type in the following without the quotes: "cd c:\adb" (this will change the path to the ADB files for the CMD prompt)

Type in the following without the quotes: "fastboot devices" (you should then see a device listed)

Type in the following without the quotes: "fastboot flash recovery recovery.img" (flashes the factory recovery image)

Type in the following without the quotes: "fastboot flash system system.img" (flashes the factory system image, may take a while to flash)

Type in the following without the quotes: "fastboot flash boot boot.img" (flashes the factory boot image)

5. Once those 3 images have been flashed, you should have seen a message that says "OKAY" after each one. You should be fine as long as you do not have any red error messages on your tablet.

Type in the following without the quotes: "fastboot reboot" (reboots device normally)

6. If all goes well, it should now boot to the Asus screen and then go to the ATT screen. If so, it will stay on the ATT screen for a while, just wait it out. Mine took about 12-15 minutes and then it opened to the new setup screen to set the tablet up as if its new!

This is how I was able to recover my bricked tablet, hopefully it can help someone else that may run into this.