HP 15-CX gaming - dpf50 la-f841p - REPAIR HELP -

These measurements do not make any sense - it seems you have a very cheap, budget multimeter and measure the voltage at switching side (MOSFETs). Try again but measure the voltages at load side of the coils (capacitors side).

Hi, are these better?

Thanks

Any solution?

Have you already tried new BIOS?

No, I will find a guide to try and do it.

Where would the bios chip be on the board?

Thanks

Smeders написав:Where would the bios chip be on the board?

And your Service Level has been reduced.

Hello,

Bios has failed to work.

The green LED on the power button does not light up which it did before the liquid damage

Smeders написав:The green LED on the power button does not light up which it did before the liquid damage

Did it light up before you programmed BIOS? Did you prepare the BIOS correctly? This is an Intel CPU + PCH platform so you need to be very careful about BIOS: post275561.html#p275561

No did not light up. Tried to reflash via USB but will order an external programmer today.

Could there still be a short on the board causing issues or are all voltages within limits? Only thing that's making me think this is that one of the MOSFETs got extremely hot within the 5 seconds of power and evaporated IPA

- Measure the resistance to ground on any pin of resistor PRB03 (with the power supply and battery disconnected from the board).
- Measure the voltages to ground on pins 1, 4, 8 of transistors PQB01, PQB03.

Hello,

Readings attached

Smeders написав:Readings attached

Voltages to ground means voltages measured with a voltmeter in reference to ground when the logic board is powered, not the voltage drop at diode range. Please remeasure.

Hello
These better?

Check the transistors PQB01, PQB03.

Hello,

Attached. Thanks

Smeders написав:Attached. Thanks

What is this about? Another measurements that do not make any sense. Check means replace with a new one in this case as your previous measurements suggest that either PQB01 or PQB03 (or both) may be faulty.

Hello,

Replacement parts arrived to day.

I have replaced both with no change. Green Power light does not light up still either.

Remeasure the voltages to ground on pins 1, 4, 8 of transistors PQB01, PQB03.

Hello,

Attached as requested. Thanks

Smeders написав:Attached as requested.
[ Obrazek ]

The voltages seems better, but your pin count of both transistors is most likely wrong.
The pins are count as on the following picture: