I'll go for deep discharge

No I tried everything like that

It does go into flash but I don't see the screen and it doesn't take any input

If I plug it into the computer via USB, I can't write to the device either

The owner fiddled with the bios to install Linux and now it's ded

Aww shuck

Aint dells configed to autoupdate from usb stick ?

I mean throw new fimware at it

It shouls auto-process it as far as i know

And ofc in process reset bios

I believe dell has their own image for just bios resetting tablets

Due that

So if youbare lucky and that tablet supports fw update/reset vbios tool

Interesting, let me check that

But, I think he disabled the USB controller, too

Because nothing else boots

Probly under some name like "bios recovery 6264819"

Bios should still check for update even tho its "disabled"

As its part of self-check

And self preservation code incase idiots like ex user of that tablet

That repair technicians have some chance

I managed to get it down to 4%

Let's see if deep discharge is the key for now

I can still try that one later

It's losing about 1%/hour

hw do u check the batt

Rip battery

Lipo terrorist cell

i doubt it's going to work because there's probably a cmos battery in there

∆

I doubt there is one, it's way too thin to fit a button cell + Mainboard + screen

@whodun1t when the battery is below 5%, the screen turns on and shows "Low batter N %" for a few seconds

All it need is small corner somewhere

This seems to happen before loading BIOS

i've seen coincells thinner than a die+substrate

that are just soldered straight to the board

How long would such cell even last?

few years probably

a quick google puts it at 10% in 5 years

self discharge