[Android Q&A, Help & Troubleshooting] Lister Of Smeg:
Hi [MENTION=5919159]Tzul[/MENTION],

Apologies for the delay, work has been kinda manic lately... anyway, some SUCCESS at last.... but still, many failures!! :( lol

I've now managed to find a way to 99% get into the recovery via key combo commands. I did a bit of Google'ing... And came across an old post about 3x different methods to get into Lenovo devices recovery. One of the Methods suggested holding down ALL THREE KEYS at once. I tried this, but the Tablet will not turn on/boot this way. How I found it to work is...

1) Press the Power Button. 2) Then straight away hold down both Vol Up and Vol Down together, and then cycle through repeatedly pressing Power Button. This method normally takes you to "No Command" screen, after which you can use the secret menu.... So it seems Recovery via the device itself is now possible!! :D

Yes, both Windows 7 x64 and Windows 10 x64 both install the driver correctly, as per your instructions. And the device/port briefly shows up when the Tablet (in OFF mode) is connected. It straight away disappears again. I have been able to double click it before it disappears, and see it's settings... but as soon as I cancel, its disappeared again (which is normal/expected).

Oh, I thought some devices needed a special patched boot.img before you can attempt to install systemless root. That's what the developer of our N7000 / i9100 devices has said in the past...?

I tried the above, in TWRP 3.0.2.x on my i9100 just as a test. The command excuted perfectly, however when I flashed the mentioned SuperSU in TWRP... it said something alone the lines of "Failing to patch.... Aborting". Can't remember the exact wording right now, can look it up... But just think I'm a long way off before I attempt to try a Systemless root on the TB3-850F until I've managed to get a STOCK rom backup. lol

Yeah, I did think that was nonsense.. But unfortunately I couldn't dispute his statement as I had to leave the Chat Session as had to return to work... :( But couldn't see how Rooting could force a Tablet to DELETE a hidden recovery partition / option within Recovery itself. Sure I can accept Rooting will break some of the functionality, such as OTA... and some key Android security features. But to physically remove a partition... seemed a tad over the top!!

Yeah I noticed those other ones, I tried all of those as well as the main MTK_AllInOne_DA, but sadly still no joy... I also noticed between each update version of the SPFT software, that the main MTK file had increased in size in each release. / Here's hoping a future update may add support for this Tablet... lol. I know you said you was able to backup and restore your Tablet with the current version of SPFT... However I am really really struggling to get it to work at mo... Unless the MT8165P model is really that much different???

Yeah, as you've stated... The current version currently doesn't support specific versions, unless identified in the relevant INI or XML files. At the time, I was desperate to try anything, in an attempt to try make it work... So yeah, gotta just keep trying till I find a setup/config that works... or hope a new version comes out.. lol

I'm just clutching at any idea's / attempts to get this software to work... And wondered if it did come down to the SPFT version, or the Download Agent within it? As really really struggling to get it to work at all....

So far, I have tried...

1) 2x Windows 10 x64 PCs (One fairly recent quad core i5 PC, the other an old slow laptop)

2) 1x Windows 7 x64 PC (fairly old dual core PC)

3) 1x Linux x64 PC (same as above, just running Linux)

4) At least 5x different usb cables

5) Different versions of the SPFT software, on Windows and Linux. On Windows the error was 0x7D4, where as the Linux error code was 1013.

What OS are you using, and are you running 32bit or 64bit??

What worries me now, if by some rare chance I do get it to work, pick up the device and make a backup. Whether I'll be equally as unlucky to get it to pickup and detect it again to ever be able to restore it.... :P lol. Gonna still carry on and try though.... Dad hasn't even used this Tablet yet!!! lol. I have noticed, if I do App updates via Google PlayStore. If I then do a wipe/erase via the internal Recovery (not Android OS reset) that is wipes the App updates off, returning it to same versions as when purchased. So this is as good as Stock, until I can get a STOCK backup... I'm just gobsmacked that Lenovo won't give this info / firmware out??

Many thanks, Lister