Hi I'm currently trying to fix this board, the problem is that when I press the power button it turns on for a couple of seconds then turns of and the current is only 0.02A, it never consumes more than that even if it's on or off. What I found is that the VCC_CORE is missing and +1.35V_VDDQP also. But the 3.3V and 5V are present. I already replaced the following: PUM1, PQM1, PQM2, UK1, PUZ1, PUZ2, PU101. I didn't notice any liquid damage or any broken parts, I replaced those with the hope of it coming back to life. I also checked if there is a short on those missing voltages and they're not shorted.
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Re: HP 15-R212NL LA-B972P Rev1.0
Why change so many components randomly?? +1.35V is missing , so why mess up with vcore section. Without +1.35V rail core and gfx will never rise. So just concentrate on +1.35V rail and check the ram ic's requirement. Have u flashed known good bios with clean me?? Check resistance on all big grey coils.
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