820-00840 Turns on slowly and wont boot from SSD or USB

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • mattpd
    Badcaps Veteran
    • Oct 2012
    • 301
    • USA
    #1

    820-00840 Turns on slowly and wont boot from SSD or USB

    Came in with small liquid damage on U3200 and U8210.

    Cleaned up U8210 and verified it's outputs.

    Flowed some flux under U3200 and ultrasonic.

    Machine turns on with power button or by plugging in USB-C and fans spin, but screen remains off.

    After about 30 seconds screen comes on and ? folder blinks with customers SSD installed.

    Tried 3 known good USB installers. All of them will give Apple logo, but then locks up forever and never boots.

    Also no WiFi networks show up when attempting internet recovery/diagnostic mode.

    The entire board looks flawless except for the U3200 area.

    Both USB ports will work to turn the machine on and charge, so U3200 is at least partially working...

    How likely is it that corrosion under U3200 is causing all of this? I have another on on order but it will be a while before it arrives...
    Tags: None
    • mattpd
      Badcaps Veteran
      • Oct 2012
      • 301
      • USA
      #2
      Re: 820-00840 Turns on slowly and wont boot from SSD or USB

      Confirmed today that both USB ports pull 20.3v.

        Comment

        Previous template Next

        Related Topics

        Collapse
        • spleenharvester
          Whirlpool PACF212HP W portable air conditioner, upper fan only turns slowly.
          by spleenharvester
          I just acquired this portable aircon, history unknown. Its behaviour is quite strange:
          • When turned on and placed into cooling mode, the upper fan (cold air out) just spins slowly. The compressor and lower fan do not run.
          • If the device is then placed into heating mode and then back into cooling mode, the lower fan and compressor kick in and start cooling, but the upper fan still only spins slowly.
          • If the device is placed into fan-only mode, the upper fan does not respond to low/medium/high speed toggles - just keeps running slowly.
          • Display and buttons all behave normally aside from the
          ...
          06-27-2025, 07:49 PM
        • taslan
          Surface 7 Pro wont boot, shows Logo and immediately turns off
          by taslan
          Hello everyone,
          as stated in the title, my surface 7 pro wont boot anymore.
          When i press the power button it shows the square windows logo for a second and immediately turtns off again.
          I dont even have a chance to get into bios or boot from usb.
          While trying to find help online it was suggested to look for help/repair here on badcaps and it might be a ME Region corruption in bios.
          I dont know what that is exactly, but i never tinkered with the bios or windows in terms of hacking/patching etc.
          Bought it directly from microsoft and used it now and then and only...
          01-16-2025, 01:25 AM
        • privato89
          Nintendo Switch Oled HEG-001: Second-Stage Boot Failure
          by privato89
          Hello everyone,

          I'm facing an issue with a HEG-001 motherboard that is unable to complete the Second-Stage Boot. I'd like to start directly with my conclusion, which is the decision to replace the MAX77621AEWI chip, and understand if it could be a correct evaluation.

          Before I dive into the process that led me to this decision, I want to mention that I have a fully equipped lab where I can perform any kind of tests.

          Let's begin:

          Following some guides online, I tried to understand how the Boot phase of the Nintendo Switch works, and what are the...
          03-26-2024, 06:37 AM
        • xenotic
          Lenovo ideapad 700-15ISK turns on, no display: boot up normally after the third or fourth attempt
          by xenotic
          Hello, hoping someone can help me with this.

          I've had this laptop for about 3 years. Lenovo-Ideapad-700-15ISK-i5-6300HQ

          a few months ago I've started experiencing this issue where I'd press the power button, everything would start up,
          keyboard lit up, fans start spinning etc., but the screen remained black. I would then power off the machine by holding the power button for a couple seconds, and try again. It would boot up normally after the third or fourth attempt. . maybe a corrupt BIOS problem ?
          12-22-2024, 09:29 AM
        • burbutsalos
          55" QLED QE55Q60T Turns on after 1 minute the picture goes bad and get in boot loop
          by burbutsalos
          Hello ,
          The issue with this set is that it turn on just fine and after a minute or so the picture shows either vertical lines or turns half black and from that point on starts a boot loop.
          If a let the unit to cool down for a minute the same pattern starts again. i had exactly the same mainboard as a spare and replaced it but nothing changed.

          Any ideas what to check?...
          12-12-2023, 06:06 AM
        • Loading...
        • No more items.
        Working...