A1466....worst blown PCH I have seen

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • reformatt
    Badcaps Legend
    • Feb 2020
    • 1549
    • Australia
    #1

    A1466....worst blown PCH I have seen

    Check this out for a catastrophic failure of the PCH on this 820-00165 board.

    PP3V3_S5 had a 11 ohm short to ground and the PCH +1.05V coil was dead short. Took off the heatsink...didn't expect to see the cap completely shattered.

    There was some bug crap and liquid ingress over the board. There was something stuck to that 2.2 ohm resistor on the 1.05V buck converter. But the real damage I believe was the crap on U7501, as those pins were for the feedback for PP3V3_S5.

    Initially I thought this was a board destroyed by bug shit, but the trackpad is also not working so more likely a spill.
    Attached Files

    if you find these attachements useful please consider making a small donation to the site

    Last edited by reformatt; 02-08-2022, 04:33 AM.
    Tags: None
    • Simplebeans
      Senior Member
      • Sep 2021
      • 135
      • UK
      #2
      Re: A1466....worst blown PCH I have seen

      Whats with you and bugs partying reformatt? Haha. So this is what they call nuclear.

      You reckon that was voltage on the PCH or has it been impact damaged?

        Comment

        • bashatm
          Member
          • Dec 2021
          • 20
          • Canada
          #3
          Re: A1466....worst blown PCH I have seen

          Was it the heat, or a hammer?

            Comment

            Previous template Next

            Related Topics

            Collapse
            • cmlewis89
              LG 47LB5DF blown power supply board
              by cmlewis89
              Hi folks,

              I'm new to this forum. So my trusty 17-year-old LG 47" LCD recently died. As I was booting it up, I heard a hum followed by a loud bang, sounds of pieces flying around, and loss of power to the unit. Inspecting the PSU, I saw two obvious problems: a blown thermistor (bang + flung pieces) and a visibly bulging main cap. Inspecting as many components as I could with my Fluke MM, I diagnosed that the following components on the "hot side" of the board were also bad: one of the 2 main MOSFETs, main 8A fuse, small cap (25V 47uF) connected to main caps, and a blown...
              12 Photos
              09-03-2024, 07:50 PM
            • drscoot
              HP X360 convertible battery blown fuse error, not charging
              by drscoot
              HP Modelnumber: 14-dh0061nb​
              This laptop had a shorted cap on a Vcore section. After replacement is works again. But there is still a battery issue.
              The battery is HT03XL and with the built-in component test from HP, in the Power section, I get an error: Logic State: Calibration required (20), Charge state: Blown Fuse (42)
              I have another same battery, also with error: Logic State: Very Weak (70), Charge state: Blown Fuse (42)
              And a third battery TF03XL (looks identical) with error: Logic State: OK (0), Charge state: Blown Fuse (42)
              All these 3 batteries are charging...
              charging section
              2 Photos
              12-15-2023, 05:54 AM
            • w00pz
              Identify blown component on HP ENVY X360 13-arxxxxx, Motherboard G1 13 AMD X360 18740-1 448.0GA03.0011
              by w00pz
              I have blown a component on HP Envy x360 with motherboard G1 13 AMD X360 18740-1 448.0GA03.0011.
              Unfortunately there are no schematics available and the component was so blown the marking weren't readable.

              I have marked it with a red circle in the attached photos - sorry for the mediocre quality I was too much in a rush.
              Hope someone will be able to identify the component.

              Many thanks for your help!

              Edit: High-res picture added on a normal board (not mine)...
              2 Photos
              11-08-2025, 02:48 PM
            • swerg
              Part selection for possible blown inductor on ASUS GX531-GW-AB76 laptop mobo
              by swerg
              Hey everyone,

              I'm a novice trying to repair my laptop. The LCD screen has an image, but no LED backlight for the image. It also produces an image when connected to an external monitor.
              I have found what I believe to be a blown inductor labeled "L4502" and "120 Ohm" in the schematics (zoomed in image, blue arrow to blown component). I have included an image of the general area of the mobo and an excerpt from the schematics as well.
              I am having trouble selecting a replacement component, which I believe to be a 120 Ohm ferrite bead, from the components...
              06-06-2024, 03:39 PM
            • ohren
              What problems could this blown cap cause in a Marantz SR5400?
              by ohren
              I'm looking at a vented C513 in a Marantz SR5400 (photo included), in the FR section on page 24 in the service manual (https://audiocircuit.dk/downloads/ma...400-avr-sm.pdf).

              R533 right below it in the photo is charred, but measures the correct value.

              1. I'm not familiar with amplifier circuits (at all — don't know the difference between classes, etc.) so I was wondering what problems would manifest from a supposedly non-operational C513? I didn't hear anything odd when testing the output channel with a speaker. Is there a simple test that can be done...
              c513 r533
              1 Photo
              10-21-2025, 09:02 AM
            • Loading...
            • No more items.
            Working...