A2289 820-01987 Question Mark

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Instafixx
    Badcaps Veteran
    • Jul 2022
    • 374
    • India
    #1

    A2289 820-01987 Question Mark

    Hello,
    Namaste.

    I have a Macbook A2289 that came in for repairs citing a reboot issue. Switched it on and i got a Question Mark folder icon. Navigated to recovery and found that the machine is detecting SSD. Went ahead to do a internet recovery but the machine kind of stops midway and boot back to the question mark folder.\
    Tried re-installing from a bootable usb. Same Issue.

    The machine overheats and stops.

    Board is clean. No dirt, dust or corrosion.
    Tags: None
    • kevingill
      Senior Member
      • Jun 2013
      • 152
      • England
      #2
      Re: A2289 820-01987 Question Mark

      Does it boot OK from an external MACOSX installation?
      Might be worth trying a new BIOS image.

        Comment

        Previous template Next

        Related Topics

        Collapse
        • Document Archive
          ALIENWARE Steam Machine R2 i7-6700T Specification for Upgrade or Repair
          by Document Archive
          This specification for the ALIENWARE Steam Machine R2 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 Steam Machine R2 boardview and Steam Machine R2 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...
          09-12-2024, 03:28 PM
        • Soulzink
          Samsug washing machine. Power supply DC41-00189a board issue
          by Soulzink
          Hi everyone,

          I am trying to fix a samsung washinmachine power supply main board.
          I already replaced it with another one to fix the machine but i want to try understand the issue with the old board.
          Therefore i hope to be able to get some help to explain what to check in order to troubleshoot.
          The power supply board reference is the following: DC41-00189a
          I have followed one thread (https://www.badcaps.net/forum/troubl...ingmachine-rel...
          04-19-2025, 06:26 AM
        • xdever
          820-01700 not booting, 4V PP2V5_NAND_SSD0 but 2.5V when the machine is off.
          by xdever
          Hi all,

          I got a 820-01700 of a friend that doesn't turn on. I read that a typical issue with these boards is the TPS62180 generating the NAND voltages, so this is where I started looking. Sure enough, PP2V5_NAND_SSD0 is 4V when the machine tries to turn on (I try to determine this by measuring PP2V5_NAND_SSD1, which is 2.5V as it should in this case. The PP0V9_SSD0 and PP1V8_SSD0 power supplies for the SSD are on at the same time when PP2V5_NAND_SSD0 is 4V). The extremely weird thing is that when the machine is off (PP2V5_NAND_SSD1=0, PP0V9_SSD0=0 and PP1V8_SSD0=0), PP2V5_NAND_SSD0...
          01-15-2025, 08:44 PM
        • Nick Nougat
          Siemens Gigaset DA810A landline telephone with answering machine resets every minute
          by Nick Nougat
          I'm posting this here since there does not seem to be a more fitting category.

          The Device
          The Gigaset DA810A is a landline telephone with an LCD screen, an answering machine and integrated telephone book. I have the version for the European (i.e. German) market.
          It has two separate modules that can operate independently of each other: One is the basic telephony part that always works and is powered by the DC voltage coming through the telephone wire. It relies the TEA1110A telephone transmission and dialler chip for that.
          The 'smart' part of the phone with the answering...
          04-01-2024, 04:00 PM
        • edugimeno
          Diagnose real-vintage Strong-Hammer arcade machine
          by edugimeno
          Hi there!
          My friend wants me to help him repair his old-real-vintage strong-hammer machine. Well it's only 90% real as the force applied doesn't lift the weight itself but it is measured and it moves a motor that lifts the weight

          I am attaching several pictures of the machine.
          It basically has 2 sides, left side has
          • 2 x 220->12+24v transformers
          • 2 relays (1 moves motor UP, other moves motor DOWN)
          • IGF and breakers for safety
          Right side is shown on pictures. It has 3 boards ( top-down)
          • Logic board. Receives 24AC and recitifies it into DC. Contains a uC (M80C85)
          ...
          02-29-2024, 11:05 AM
        • Loading...
        • No more items.
        Working...