HP EliteBook 840 G8 water damage - identify component

[rtstorm]

Hello, i got an HP EliteBook 840 G8 that has water damage, and i found this component has damage on it U60600. What is that component? I have schematics and boardview and the par no is:
SINERGY_SYV128RAC_QFN_20P i cannot fount it anywhere. Is this component have some other name?

Here is schematics + boardview

[mon2]

Silergy SY8288RAC


Just found this amazing item on AliExpress. Check it out! US $2.71 | 5pieces SY8288RAC SY8288 (AWS5MZ AWS...) SY8288BRAC SY8288B (BAB5ZD BAB...) SY8288CRAC SY8288C (BAC7LN BAC...) QFN-20
https://a.aliexpress.com/_mPSOv5K

Be sure to confirm the ‘AWS' marking code with the vendor before ordering. Others are on AliExpress.

[rtstorm]

What do you ment by confirming the AWS marking code?

[mon2]

The part is sold with different configurations. The original part is written the ‘AWS' prefix. You must state the same details to order the exact part. You can show the vendor the top side pic before ordering. Otherwise you may receive the wrong product.

[rtstorm]

Ok i will contact the seller, thank you

[rtstorm]

Somehow i managed to get a "new" board, customers bought it. And now when i connect the CMOS battery for the first time and battery the laptop turns on automatically (this is normal). And everything is working everything is ok until i shut it down, after you press the power button nothing happens. I check pin 7 on the keyboard connector and it is at 3.3V, pressing the power button does not change the voltage on that pin. I try manually short this pin to the gnd but the laptop still does not turn on.
When i disconnect the cmos battery and reconnect the cmos batt and laptop battery it will turn on, and no issue until i shut it down.
I also tested the power button when i booted into the windows, pressing the power button does not do anything.
So my question is, does the voltage need to drop on pin 7 when i press the power button, and if so why does the laptop won't turn on when i short the pin to the gnd?



Here is the board view and schematics of the 830 G8, i think it is the same as 840 G8

[mon2]

Yes, the ON_OFF# is an active low signal so when LOW, the unit should power off. If external wiring is not working then suspecting that the pinout of the reference schematic is not accurate for your logic board.

Remove all power. Meter in diode mode. Touch the meter probes for a tone beep check. Then place one meter probe to ground and other meter probe onto the first keyboard cable connector. Press the ON/OFF button - hear a tone beep? Continue to test other pins till you find a tone beep to locate the true ON_OFF# contact pin. You must be able to power on/off using only the logic board and wires. We have done this a number of times. So far, unable to locate the true schematic for the 840 G8.

Check if you have PAD300 on your logic board. If present, use tweezers to short here to mimic the ON_OFF# button.