Acer Nitro 5 AN515-43 Turns on Then Off..

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Kooopa
    New Member
    • Sep 2022
    • 8
    • Philippines

    #1

    Acer Nitro 5 AN515-43 Turns on Then Off..

    Hi! I'm back again... so I solved my previous issue but now it's back with a vengeance...

    First, history... previous issue was dead motherboard, blinking power LED, no fan spin nor LED backlight, which was caused by a missing SLP_S5#. This was fixed when I replaced the RTC crystal.

    Which brings us to the present. The screen started glitching every other 2 seconds. The screen corruption looks like the horizontal pixels/scan-lines are being shifted to different spots. This also happens on the BIOS setup. So I thought, "Okay, this might be my LCD since the thing has been showing signs of going out." I decided to test it out using an external display but I never got to that part because when I restarted from Windows, it decided to crap itself and not POST. Now the power LED just turns on, the fan spins, and the keyboard backlight comes up, then everything turns off all happens in about 3-5 seconds.

    So I made the usual recovery procedure. Hard reset, BIOS reset, RAM re-seat/replacement, but nothing worked. So I decided to probe the board, I chased the entire Power On Sequence and everything, and I mean everything, is present and accounted for on the APU side. But the VGA side of things, the first thing on the sequence "PE_GPIO1(DGPU_PWR_EN)", is missing. So okay then, this might be a corrupt BIOS again, and fortunately I dumped all of the ROM chip in the board because of the previous fiasco. The backups are tested, all known good and working, so I removed the chip and flashed the backup and... nothing changed.

    So okay then maybe there's a short somewhere on the PE_GPIO1 (DGPU_PWR_EN) line, so I checked with the multimeter and nothing is wrong in it. So as a test, I removed the jumper resistor RV403 and injected a voltage signal on the DGPU_PWR_EN side to see if the succeeding voltage rails will come up, and they did. Then I checked the resistance of PE_GPIO1 to ground and it's like 10kohms high.

    I don't know what is needed for the APU to output PE_GPIO1(DGPU_PWR_EN), but from my test everything down the line are present.

    One weird thing I noticed is that the control signals like "APU_RST# and APU_PWROK" the APU sends out reads low like 0.245V. Is this normal on this platform?


    TLDR:
    • Laptop No Post, Power LED, Fan Spins then off
    • Checked entire power on sequence and required rails, all present
    • Missing PE_GPIO1(DGPU_PWR_EN) signal
    • APU control signals at 0.245V
    • Reflashed BIOS with known working backup



      Any ideas is greatly appriciated


      Thanks!!! in advance

      PS. Attached Schematics MOD EDIT: Link to schematics https://www.badcaps.net/forum/troubl...need-schematic

Related Topics

Collapse

  • Document Archive
    ACER NITRO Nitro GX50-600 NITRO 50 i5-8400 Specification for Upgrade or Repair
    by Document Archive
    This specification for the ACER NITRO Nitro GX50-600 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the NITRO Nitro GX50-600 boardview and NITRO Nitro GX50-600 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet,...
    09-12-2024, 03:28 PM
  • Document Archive
    ACER NITRO Nitro N50-600 NITRO 50 i7-9700 Specification for Upgrade or Repair
    by Document Archive
    This specification for the ACER NITRO Nitro N50-600 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the NITRO Nitro N50-600 boardview and NITRO Nitro N50-600 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or...
    09-12-2024, 03:28 PM
  • Kooopa
    Acer Nitro 5 EC_RSMRST# present, Missing SLP_S5#!!!
    by Kooopa
    Hi! I'm diagnosing my Nitro 5 AN515-43 Mobo: FH50Q LA-J621P. I left it on sleep mode but when I came back It won't turn on. Power LED would turn on for a few seconds then off. no fan spin nor keyboard backlight.

    So I tried the usual procedures first, power cycling and bios reset but non did the trick so I decided to delve deeper.

    Nothing strikes as red flags aside from the dust. there's no history of any liquid being poured at it since I bought the thing, I've been real careful. Anyways.

    I checked the usual rails +5VALW +3VALW even the 1.8VALW and 0.9VALW...
    09-06-2024, 11:38 AM
  • Document Archive
    Acer Nitro Acer Nitro 5 Black Notebook 5 Specification for Upgrade or Repair
    by Document Archive
    This specification for the Acer Nitro Acer Nitro 5 Black Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Acer Nitro 5 Black boardview and Acer Nitro 5 Black schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet,...
    09-07-2024, 04:10 AM
  • Document Archive
    Acer Nitro Nitro 5 AN515-57-775V Notebook 5 Specification for Upgrade or Repair
    by Document Archive
    This specification for the Acer Nitro Nitro 5 AN515-57-775V Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Nitro 5 AN515-57-775V boardview and Nitro 5 AN515-57-775V schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification,...
    09-07-2024, 04:10 AM
  • Loading...
  • No more items.
Working...