User Profile

Collapse

Profile Sidebar

Collapse
martin83
martin83
Member
Last Activity: 07-25-2025, 04:33 PM
Joined: 11-18-2023
Location: Lisboa
  •  
  • Time
  • Show
  • Source
Clear All
new posts

  • Can anyone help? Has anyone had similar problems?
    See more | Go to post

    Leave a comment:


  • Acer nitro 5 AN55-515 fh51m LAJ871P no picture

    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...
    See more | Go to post

  • Hello everyone, I'd like to thank you for your help and say that I've now resolved the issue.

    The laptop is stable when connected to the battery and charger, with decent temperatures, and has already passed the 3DMark test.

    What I did: Replaced R67002 with a new 1k ohm 402 resistor, 1% instead of 5%, and replaced C67059 MLCC 2.2UF/6.3V (0402) X5R W05 (this one wasn't shorted, but it was discolored compared to the others, and I risked replacing it). The 5V line resistance no longer drops to 500 ohms when the machine is hot after working.
    A few hours after testing...
    See more | Go to post

    Leave a comment:

No activity results to display
Show More
Working...