Huawei Matebook D14 NBL-WAP9R (DAH98AMBAD0)

[ROONEY50]

Hi.

I'm learning about fixing computers and have received a dead Huawei D14. It has a nearly fully charged battery in it (16.5v) but no charger(USB-C). Without the battery connected, these are the ohm readings I'm getting.

3.3v coil - 25 ohms
5v coil - OL
The other 3 coils on the board are showing

250 ohms
45.3 ohms
4000 mega ohms

I'm assuming the 3v is shorted maybe?

When I power the laptop on, it shows as dead. No CPU heat, no picture and no fan. However I noticed the 3.3v and 5v coils are showing the right voltages.

No 3.3v is showing on the BIOS chip pin 8

Voltages on the other 3 coils are showing 0v

What should I do next?

[ROONEY50]

I found a charger but it only shows 5v on the laptop connector and not 19v.

[ROONEY50]

Just a bit of guidance needed as I'm new to this.

[Sephir0th]

25 Ohms at the 3V Buck is a clear partial short. Voltage injection from here, combined with thermal camera if necessary.

[ROONEY50]

I injected 1v at the 3v inductor and couldn't find anything heating up. It's pulling 200mv. I then put 3v through it and it's still pulling 200mv, and couldn't find a heat source. Is 3v my limit or can I push more?

[ROONEY50]

?