[Lenovo Yoga Tab 2 Questions & Answers] dallivadr:
Hey [MENTION=6989333]NeedaVirus[/MENTION],

Sorry to hear that the device is bricked. Just this past weekend, I've been sifting through all my old resources because a recent OTA (Yep, a 2020 update!) left both me and my partner's 1050F devices in an unbootable state. You can see we're not alone by checking out the thread on the Lenovo forums (https://forums.lenovo.com/t5/Androi...Tablet-2-1050f-system-update-2020/m-p/5007166). Unfortunately a large number of the very helpful resources on xda seem to have been redacted/removed over the past few years, which leaves a few people scratching their heads (I was for a while too).

Basically, the way I've always done this on the 1050F (and what worked yesterday again), is as follows:

1. Install the "IntelAndroidDrvSetup1.10.0". Google will find this easy enough.

2. Install the flash tool. Nowadays, "Intel Platform Flash Tool Lite 5.8.4.0" (might also be called Phone Flash Tool Lite v5.8.4.0 and again google will find this for you) seems to come bundled with all required drivers, so it's a simple process to install.

3. Plug the device in and put it in DNX mode. This mode is achieved by holding vol up + vol down and pressing the power button until the device vibrates. When you feel the buzz, let go of power but hold the other two until you see a "Fastboot starting..." message on a black screen. This is DNX mode.

4. Restore stock KitKat bios using the "restore-kitkat-bios-830-1050-v2" tool. This one might take a little finding and I'm not sure if sharing it here is acceptable any more. Provided the device is plugged in and in DNX mode (and you have the Intel Platform Flash Tool closed too), it's just a matter of running the bios restore tool and following the prompts. Make sure the flash tool is running on your local drive (usually C).

5. Once the bios is pushed, we need to restore the stock KitKat ROM using the platform flash tool.

First we need to set up the Platform Flash Tool, so open that and select "File" -> "Options". Under "Flash options" tick the "Force fastboot sparsing" option and select "500MB" for the size.

6. Now, we want to use the "YT2-1050F_S0198_150422_ROW" image and you'll need to extract it first. It sounds like you already have the right archive file for this, which is good because I'm not sure if a copy still exists here still.

In the Platform Flash Tool, hit "Browse" and the file we're looking for is "target_bin\flash.xml". Select that. (Side note: I suspect that if your device has been updated to Lollipop in the past, you wouldn't have had any luck flashing this rom without rolling the bios back first).

7. Put the device into DNX mode again, and the Platform Flash Tool should see it (a "Baytrail" device is listed).

Now it's just a matter of starting the flash process by clicking the button.

8. Once the device is flashed, you'll need to reboot it (via the device) but wait for the flash process to report 100% first. Hitting the device power button is the way to confirm this reboot btw. It might take a few mins to get into Android here. This is normal.

9. Now, the device will boot into stock KitKat. We need to set the region though:

Open contacts, add new contact (only if you have none, we just need one).

Now, using the contact search, enter ####6020# and you'll be prompted to select your region. The device will reboot and you'll need to set a few things up again.

10. Run all the OTA updates to get right up to date. Just do this via android itself.

Optional: Do any other crazy bootloader unlocks, roots as desired. A lot of the original resources have been removed for these processes, but where there's a will, there's a way.

I'm sure there are other shortcuts to this process too. I think tontonfraguer was able to just flash a newer rom directly to resolve his bootloop, judging by his forum post over on the Lenovo thread. This is just the process I use, any feedback/improvements are most welcome!

Hopefully it helps someone being hit by the recent bootloops.

Cheers