Story of another dead deer and a doppleganger.

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • momaka
    master hoarder
    • May 2008
    • 12175
    • Bulgaria

    #21
    Re: Story of another dead deer and a doppleganger.

    I think it is just something to do with high-resistance resistors, because like I said, I've seen a few PSUs fail exactly for this same reason - open IC/transistor biasing resistor. On that note, I do have one repair like this for the worthless repairs thread.

    Comment

    Related Topics

    Collapse

    • khalillll
      maxipower 400W Dead power supply repair
      by khalillll
      The power supply was completely dead. Voltage reached the main capacitors, but nothing after that.
      After checking, I replaced the UTC7606D IC to restore the 5VSB.
      I using SDC606U as a replacement, but it didn’t work — possibly the IC itself was faulty.
      Replaced it again with another UTC7606D.
      Result: 5VSB came back, but still nothing — no 12V, 5V, or 3.3V.
      After checking again, I think the issue was with the UTC7520D IC.
      Replaced it with a WT7520.
      Result: PSU fully working again
      ...
      09-27-2025, 05:06 AM
    • double_DD
      How can I be sure that my EC chip is dead?
      by double_DD
      Hi all,

      As the title suggests, how can I be sure that my EC chip is really dead?

      I've recently gotten into this hobby of laptop repairs, and have successfully brought back to life a couple with some easy fixes, mostly shorted caps.

      Now I'm working on HP Probook 455 G8, that had some "devil" run around on 3V line, burning a bunch of stuff. Luckily I have a dead 455G7 (for spare parts) so I managed to fix it (swapped burned parts) to a point that it will charge (both on barrel jack and usb-c), but it doesn't want to turn on. There is a 3V3 on a keyboard...
      03-12-2025, 07:47 AM
    • disorder
      ps5 edm-033 dead after hdmi/usb ports destroyed
      by disorder
      hello guys,

      i need help to repair a edm-033 ps2
      history : as always hdmi port and usb ports destroyed after unplugged
      after change them, ps5 dead too : 1 beep, no blue light. after inspection 1.8v power was shorted, and because of dead panasonic chip. after remove it : no short anymore
      so i changed it
      now i have got 5v stby,, 3.3v stby, 3.3v power, 1.8v power and no short on them
      but the ps5 is dead again : 1 beep, near 10 seconds with power lines and then off, no blue light ...

      i don't see any projection of liquid metal on pcb.
      ...
      01-14-2025, 12:48 PM
    • zunasthegreat
      Chieftec GPS-450-AA with dead 20N60C3
      by zunasthegreat
      Hello everyone hope all doing well!
      I have this PSU (GPS450-AA delta oem) around for like 4-5 years and I had it recapped early 2020 or 2021 with mostly UCC KY and Nichicon PW's. The bulk was and still is fine, the original Ltec's were bloated and empty. The previous issue was some major coil whine noise and at times random shutdowns when going idle. Today it started tripping the mains breaker and I think I have dead APFC mosfets (20N60C3). Right now upon checking I have the Q1 and Q3 FETs dead so far and I guess those are responsible for the PFC circuit. The only thing I care is If there...
      09-01-2024, 07:12 PM
    • Beton
      Finding a dead short component
      by Beton
      Hi guys!
      I searched for the term "dead short" in the forum but no specific thread came up however if I'm just blind and couldn't see the thread talking about this please forward me to that direction.
      So my problem is I don't know how to find the source of a dead shorted voltage rail. Dead short = ~0 ohm resistance.
      I have two VGAs (HD 4850 and HD 4870), both dead shorted to ground on the memory rail. I have the boardview file for the 4870 and the memory rail consists around ~7892346 capacitors...
      I have a bench PSU and if I try to inject voltage the voltage...
      12-10-2021, 01:05 PM
    • Loading...
    • No more items.
    Working...