Lenovo P50 power-on issue

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • palady
    Member
    • Jan 2014
    • 21
    • si
    #1

    Lenovo P50 power-on issue

    Hi,

    Lenovo P50
    MB: BP500, NM-A451, VER 1.0

    Issue: won't start. Power LED turn on for 1 sec.
    I check rails, they're all work a short time, looks fine. Only GPU reg. is silent. EN pin is 0V.
    I didn't find any shorts corrosions, mechanical demages, etc. Any sugestion?

    I hope the CPU is not dead

    Schematic and boardview -> https://www.badcaps.net/forum/troubl...96#post3242496

    Last edited by Vesko356; 03-26-2024, 06:14 AM. Reason: Attached schematic and boardview removed and replaced with link
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4439
      • France
      #2
      Re: Lenovo P50 power-on issue

      CPU VCore ok?
      Tried known good compatible RAM?
      Tried to flash the BIOS?
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        Previous template Next

        Related Topics

        Collapse
        • shahnld
          Lenovo legion 5 pro startup issue
          by shahnld
          Good day Experts
          I have a lenovo Legion pro 5 16ACH6H with AMD RYZEN 7 5800H and RTX3070,.

          A weird issue has troubled me. If i power on off the laptop 20 times then only power LED will lit but no fan spin no display. At this stage gpu, vram. DDR voltage. 5v 3.3v 1.8v and the rest are present and cpu core is stuck at 0.84v.

          And sometimes lets say the 21st time it will boot perfectly and there is image and everything is working perfectly and at this stage i see cpu core...
          08-24-2025, 12:31 PM
        • riko 656
          Lenovo Legion Slim 5 16APH8 (RTX 4070) - Turns on for a few seconds then shuts off. BIOS issue.
          by riko 656
          Hello everyone,
          I need help with my Lenovo Legion laptop. It turns on for a few seconds and then immediately shuts down. I believe this is a BIOS corruption issue.
          Laptop Model:
          • Model: Lenovo Legion Slim 5 16APH8
          • GPU: NVIDIA GeForce RTX 4070
          • Main BIOS chip size: 32MB
          • VBIOS chip size: 16MB
          Problem Description: The laptop was working perfectly. Now, when I press the power button, the keyboard lights up and the laptop powers on for just a few seconds, then it shuts itself off completely. After researching, I am convinced it's a corrupt BIOS.
          What I Have Tried So Far:
          1. I
          ...
          11-04-2025, 05:14 AM
        • db80
          Lenovo Ideapad 5 15ARE05 startup issue
          by db80
          Hello friends,

          I've been racking my brain over the past few months on the following issue:
          I have a Lenovo Ideapad 5 15ARE05 laptop that basically works fine as long it starts up at all.

          If you shut it down, often you hear the HDD still spinning and the Power LED remains on, it only shuts down if you force it (pressing the power button for like 15 seconds).
          Then, if you want to Switch it on, nothing happens, only the Power LED lights on, nothing else. If you leave it, then after like 30-60mins it turns on itself.
          I tried all the common alleged „fixes“...
          07-06-2024, 05:58 PM
        • coasterghost
          Lenovo T14 Gen 2 Type 20XK Model 20XK0069US Odd Charging Issues
          by coasterghost
          For Badcaps Readers, Please note that I am hopefully going to present this same message to Lenovo to see if they have any insight to the matter as well and figured to share the entirety here for clarification. The System is out of warranty as it is but does have the option to have it extended.

          Model Information: T14 Gen 2 (Type 20XK, 20XL) Laptop (ThinkPad) - Type 20XK - Model 20XK0069US
          Board: T14 Gen 2 (Type 20XK, 20XL) - Type 20XK.

          System Hardware:
          Processor: AMD Ryzen 7 PRO 5850U
          Memory: 1x 16GB DDR4 3200 (Soldered on Board); 1x Crucial 32GB DDR4...
          09-08-2025, 10:46 PM
        • totof
          Lenovo Ideapad 3 15ALC6 motherboard issue
          by totof
          Hello,
          I have a Lenovo Ideapad 3-15ALC6 computer that I'm trying to repair.
          Initially, the computer wouldn't start, and there was no power consumption from the charger. The board itself is reference HS261&HS561&HS761 NM-D521 rev 3.0, where you can find the schematic and board view here: https://www.badcaps.net/forum/troubl...-hs761-nm-d521

          When I opened it, I noticed three burnt components near...
          10-26-2025, 10:27 AM
        • Loading...
        • No more items.
        Working...