LA-4855P Schematic

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  • Mirenia
    Acer Helios 500 (PH517-51) - unexpected reboots when laptop is warm (cold solder joint issue?)
    by Mirenia
    Hi everyone,

    got an Acer Helios 500 Laptop (PH517-51) for diagnosing with a strange issue:

    The laptop runs for a while (1-2 hours, sometimes less) and then suddenly shuts completely off, like someone pulled the power cord and restarts immediately after on its own.
    If this happened once, then the laptop only runs for a few minutes until restart.
    This happens regardless while staying in windows or uefi or in a linux environment.

    At first I thought of a normal overheating issue, but as I monitored temps with HWInfo64, nothing seems very hot.
    ...
    01-05-2025, 05:15 PM
  • ahmarzo
    Acer laptop battery draining issue
    by ahmarzo
    Have a acer laptop ex215-22 with motherboard part no daz8emb18a0 the issue is the battery gets drain overnight upto 25-30 percent even when switched off / shutdown.even after ssd is removed and laptop off with button the battery keeps draining.i have updated the bios but same issue have tried another new battery and the charging works fine only issue is battery is discharging when connected to motherboard in off condition.
    Help me to diagnose this issue as there is no shortage in the inputs MOSFET
    08-02-2025, 06:39 AM
  • atunguyd
    Acer x163w Monitor PSU schematic
    by atunguyd
    Ii wonder if anyone can help me. I have a Acer x163w monitor which is not powering up. The PSU main capacitor's one leg had completly come off - I replaced it but the PSU is still not outputting DC. I found the monitor in questions service manual here on manuals lib but the schematic in there is a completely different - the schematic shows no mosfet to drive the transformer while the one I have does use a mosfet - also the schematic shows only one optocoupler but mine has two.
    The PSU board is labelled FM-20A02-AAA made by APD as per the image below. I am trying to find a schematic for this...
    03-05-2025, 02:08 PM
  • wasyl
    Acer Nitro AN515-46 HH51R LA-M002P R1A BoardView File + schematic
    by wasyl
    Hi, did not found here so uploading to help...
    09-15-2025, 07:40 AM
  • Proxy64
    Looking for Acer Predator 17 G9-793 (N15P4) schematic
    by Proxy64
    Hi, I am looking for schematics for an Acer Predator 17 G9-793-73A6?
    I can not read the last digit, maybe 6.
    In another topic I found a boardview that seems to match mine: Acer Predator 17 G9-793 - Pegatron MU5DC CH7DC BoardView
    But in the same topic schematics don't match (both board view & mine) : Acer Predator 17 G9-793 - Pegatron MU5DC CH7DC REV 2.0
    On this mainboard, the GPU is dead (shorted), but I am trying to have it booting without the GPU Nvidia, to disconnect GPU I have desolder 3 coils powering the GPU, and one bigger in upstream these 3.
    Now it begin...
    06-05-2025, 09:30 PM
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