Specific Data-Recovery Assistance on no-power 820-02536 (A2681)

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • ugamazing
    Senior Member
    • Jun 2013
    • 169
    • usa
    #1

    Specific Data-Recovery Assistance on no-power 820-02536 (A2681)

    Received this unit for data-recovery only. Unit has no power and charger cycles the instant it boosts to 20v on all ports. Unit will show life when REVIVING, but fails DFU eventually (expected DFU mode, i.e. a cycle/restart of SOC). Board and unit are super clean, I suspect the unit may have simply lost power at a critical point of update. Customer doesn't care about repair, only wants data. But I strongly feel a restore is what the unit needs. Again, during revive, video will show on LCD, but there is never any trackpad click (I'm unsure if there is normally anyway at this specific point, reviving an 02536). To be sure, I tried board in different working unit to eliminate all non-board components. Revive still fails.

    I think a restore would fix the board, but it will erase the data. No target disk pre-boot modes anymore, so unsure of what to even try.

    Any suggestions?
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • ngml
      Repair of an LG split AC system indoor unit PCB
      by ngml
      I am trying to repair an LG split AC indoor unit, which does not start and gives a CH05 error code.
      This indicates an error in the communication between the outdoor and the indoor unit.
      The outdoor unit is fine, so the problem is the indoor PCB.
      The indoor unit is an LG PC09SQ NSJ (3SNM09JA2FA), and the PCB has the following type number: EAX35907219-1.2 (see photo1)
      I changed optocouplers ICO1X & ICO2X and the NPN transistor S9013 which drives optocoupler ICO2X (see photo2), but this did not remedy the fault.

      Does anybody have the schematics of this board,...
      2 Photos
      02-01-2025, 12:55 PM
    • mferna14
      MacBook Air A2681 battery problem after Screen Replacement
      by mferna14
      Hi, my dear friends., Maybe this might be a stupid question or something I missed or do not know. I have 2 MacBook Air A2681 (Indentical color & EMC #), both LCD screens broken. Before ordering the LCD Screens I confirmed both worked with their respective batteries & AC Adapters, & they did 100%. The LCD Screens came in today & I replaced LCD for the 1st A2681. (Removed Battery Terminal cable for both Laptops before installation of LCDs). Perfect Screen & Booted up fine. But it did not work with battery. I checked the battery connector & it was seated in well/perfectly....
      12-06-2024, 08:10 PM
    • nobbnobb1
      Bose Companion 5 - Unit Powers On then Cuts Off Shortly After
      by nobbnobb1
      Hi guys,

      Trying to salvage a Bose Companion 5 computer speaker system that powers off shortly after powering on. It's got a primary USB input (built in DAC) and an aux 3.5mm input. The USB appears to be the primarily source that tells the unit to power on (control pod LED goes green) as the unit has no power switch.

      When I first connect power to the unit, plug in the USB, it will play audio nicely for a minute before it drops out and the unit appears to go into standby (control pod LED goes red). It stays in standby and I cannot seem to power it back on without physically...
      02-03-2022, 11:14 AM
    • Gjackson
      Air-conditioning unit power supply failing to power up
      by Gjackson
      Hi all, I managed to narrow down which PCB was causing my Haier AC to throw out an E7 error code (E7 indicates that the indoor unit and outdoor unit cannot communicate). I found that the outdoor unit power board which gives 5v and 15v to the outdoor unit module board fails to fully power up.. The power Led starts to fade in incredibly slowly and the 5v and 15v power buses jump around like crazy and never reach their required voltage. I unplugged the module board from the power board and the power board powered up fine! It had a steady 5v and 15v out and the power LED came on instantly and Bright....
      01-08-2022, 09:24 AM
    • navagator
      Hitachi Power Supply Unit Interchangeability
      by navagator
      I have a Hitachi 57F710E rear projection set with a bad power supply board. I've tried to fix it with help from this forum as well as another one, but without success. Today I found a Hitachi rear projection set for sale on Facebook that looked just like mine. After contacting the seller I found out it was a 51F510. According to the service manuals my set uses a HA01312, POWER UNIT DP4X-DM_24W and the 51F510 uses a HA01313, U901, POWER UNIT DP4X_24W.

      Does anyone know if these 2 power supply boards are interchangeable?

      Thanks.
      01-08-2024, 07:53 PM
    • Loading...
    • No more items.
    Working...