Hello everyone.
I'm here to ask for help troubleshooting an issue with my Acer Nitro 5 An55-515. Board number fh51m LAJ871P .
The laptop turns on without any image, and after inspection, I noticed the 1.2V voltage was reading 8V spikes. The PQM1 MOSFET's gate was shorted to the source.
I replaced PQM1, PQM2, and PUM1. After turning on the machine, the 1.2V voltage appears correctly for about 1 minute, but after that, PQM1 shorted again. The MOSFET and controller assembly has already been replaced twice and continues to blow. I can't understand what's going on. I should also add that the machine boots normally after a CMOS reset, turning it off, and then on again, but then it doesn't work, I think due to the 1.2V issue.
Resistances present on the board:
3V 1.2Kohm
5V 127Kohm
1.2V 224 ohm without memory
PLV2 (VBAT) 150kohm
1.05v 39.4 Ohm
1
1.35v VSdgpu 1.5kohm
+nvvdd 0.8ohm
1.8v 4.24kohm
vcciop 46ohm
vccsa 18ohm
vcore 2ohm
vccgt 6.5ohm
Thank you all in advance
I'm here to ask for help troubleshooting an issue with my Acer Nitro 5 An55-515. Board number fh51m LAJ871P .
The laptop turns on without any image, and after inspection, I noticed the 1.2V voltage was reading 8V spikes. The PQM1 MOSFET's gate was shorted to the source.
I replaced PQM1, PQM2, and PUM1. After turning on the machine, the 1.2V voltage appears correctly for about 1 minute, but after that, PQM1 shorted again. The MOSFET and controller assembly has already been replaced twice and continues to blow. I can't understand what's going on. I should also add that the machine boots normally after a CMOS reset, turning it off, and then on again, but then it doesn't work, I think due to the 1.2V issue.
Resistances present on the board:
3V 1.2Kohm
5V 127Kohm
1.2V 224 ohm without memory
PLV2 (VBAT) 150kohm
1.05v 39.4 Ohm
1
1.35v VSdgpu 1.5kohm
+nvvdd 0.8ohm
1.8v 4.24kohm
vcciop 46ohm
vccsa 18ohm
vcore 2ohm
vccgt 6.5ohm
Thank you all in advance
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