Lenovo B51-80 green led flashing shortly

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • darkm4n
    New Member
    • May 2021
    • 3
    • Romania
    #1

    Lenovo B51-80 green led flashing shortly

    Hi,

    I am trying to repair a dead Lenovo B51-80 laptop, currently with the battery connected it doesn't power on, it's completely dead, when I connect both battery and charged the green led near the DC input connector stays on but the green led from the bezel stays on for about 2..3 seconds than quickly flashes once than again stays green for another 2..3 secs and the sequence is repeating itself, the laptop does not power on.

    I did search for a schematic/boardview and could't find any and I don't have much experience with Lenovo laptop boards. I could't find any short on a quick look and also no visible damaged parts.

    Does anyone have any ideea that could point me in the right direction ?
    I believe the charging and power circuit is similar to the B50.


    Thanks!
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14002
      • Canada
      #2
      Re: Lenovo B51-80 green led flashing shortly

      Hi. There are many B50 schematics in my database.

      Can you identify which schematic you are referencing ?

      LA-B091P ?
      LA-B092P ?
      LA-B101P ?
      LA-B102P ?
      and there are others...

        Comment

        • darkm4n
          New Member
          • May 2021
          • 3
          • Romania
          #3
          Re: Lenovo B51-80 green led flashing shortly

          Hi mon2,

          This is a B51-80, not a B50.
          I did find a schematic online for B51-80 but it seems it's missing the charging circuit and boardview is not available anywhere.


          Thanks!

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14002
              • Canada
              #4
              Re: Lenovo B51-80 green led flashing shortly

              We don't need no stinkin schematics...review where the DC adapter mates to the logic board.

              There you will see (most likely) 2 large mosfets and a charger IC nearby.

              Post the markings of the mosfets & charger IC that will be linked to these mosfets.

              First, is your battery known to be good ? What is the history of this unit ? Just decided to not work or liquid damage ?

                Comment

                Previous template Next

                Related Topics

                Collapse
                • JDong
                  Problems flashing BIOS for supervisor locked Lenovo V15 G4 IRU 831A laptop
                  by JDong
                  There was an error... Aborting......I'm using another Linux Laptop with Zorin OS...to try and patch my Lenovo V15 G4 IRU with above specs....It originally had Windows 10/11 installed and converted to a dual boot Kali OS/Parrot OS system. I may have used the wrong lenovo_autopatcher_0.2 (I believe was posted by @knucklegrumble....I am out of ideas and flat broke so i cannot afford another fix (spent it all as an e-com entrepreneur does) any help from anyone would be GREATLY appreciated.....
                  • Laptop Model: Lenovo V15 G4 IRU
                  • Issue: Forgotten supervisor password.
                  • BIOS Chip: GD25B128E (or GD25B128B
                  ...
                  07-06-2025, 10:18 PM
                • B2L_Repairs
                  Lenovo g50-80 charging led flashing but laptop not switching on
                  by B2L_Repairs
                  I got a lenovo g50-80 that shows charging led (orange LED flashing) and when I press the power button the white LED comes on but the laptop doesn't switch on. The fan spins for 2 seconds when I press the power button then it stops. This problem started when my charging dock broke the connecting wires and i soldered these wires back but I might have mixed them. I ended up buying a new charging dock but laptop never switched on it just shows flashing orange LED when charger is connected. Could the super io be bad? I don't know how to go about diagnosing and I can't check any board view since this...
                  01-19-2025, 12:28 PM
                • STKR123
                  Elitebooks (820, 840 etc. all gens) and those continuously flashing Power LED + flashing CapsLock LED
                  by STKR123
                  As the Elitebooks (820, 840 all gens) only show flashing Power LED and flashing CapsLock (continuously) + a very soft "ticking" noise near the DC Jack,
                  I wonder if re-flashing the BIOS might be of any use here.

                  As far as I understood, steady flashing either means insufficient power or a CPU/GPU/Motherboard issue. I use the original 65watt power supply.

                  There are so many threads out there, but most of the solutions involve flashing codes, which I dont have or claim that you MUST use the original power supply, do a hard reset, reseat the RAM, clean the RAM,...
                  11-03-2024, 06:58 AM
                • Document Archive
                  Lenovo 3000 Series Schematic
                  by Document Archive
                  Lenovo 3000 Series Schematic

                  Lenovo 3000 was a line of low-priced notebook and desktop computers designed by Lenovo Group targeting small businesses and individuals. It was replaced with the IdeaCentre and IdeaPad brands.

                  3000 C100 laptop with Braille keyboard
                  Lenovo 3000 C
                  C100, C200 - 15-inch XGA screen
                  Lenovo 3000 N
                  N100, N200 - 14.1-inch- and 15.4-inch- WXGA models
                  N500 - 15.4 inch screen.
                  Lenovo 3000 V
                  V100, V200 - 12.1-inch WXGA models
                  Lenovo 3000 G
                  G400, G410, G430, G450, G455, G510, G530, G550, and G560...
                  10-04-2024, 06:05 AM
                • Document Archive
                  Lenovo IdeaPad 120S Notebook 100 Specification for Upgrade or Repair
                  by Document Archive
                  This specification for the Lenovo IdeaPad 120S 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 120S boardview and 120S 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 download for Lenovo IdeaPad 120S...
                  09-06-2024, 06:40 AM
                • Loading...
                • No more items.
                Working...