TH-42PZ77U Power Supply ETX2MM681MFS Dead Short

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • amules
    Member
    • Apr 2014
    • 12
    • USA
    #1

    TH-42PZ77U Power Supply ETX2MM681MFS Dead Short

    Hi all,

    I have a TH-42PZ77U that has no blinking LED. I opened her up and found that the Power Supply ETX2MM681MFS has a dead short and it's blowing the 10 amp fuses at the 120 source. I replaced the fuse with the same 10amp fuse plugged it in and pop!

    I'm thinking it has to be a shorted FET on the board somewhere.. Has anyone had any experience with this situation and repairing one?

    Thank you all for the advice in advance..
    Last edited by amules; 09-29-2014, 09:33 PM.
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • Tynan Dill
      Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
      by Tynan Dill
      I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

      Upon bringing it home and plugging it up, it showed a standby light.

      I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

      The screen seems to blackout and stay black, but with a flashlight I can see the display.

      With my Playstation 4 connected via HDMI, and running a game I can hear sound.

      Assuming...
      ORIGINAL POWER SUPPLY BOARD
      7 Photos
      11-22-2024, 01:46 PM
    • sam_sam_sam
      Desoldering gun station modified to use a 18 volt @ 20 amp switching power supply
      by sam_sam_sam
      I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump

      One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy...
      03-31-2024, 02:12 PM
    • Babbar
      Argon SA1 audio amplifier power-supply - fuse blown after fixing the short?
      by Babbar
      I found a project in the electronics trash yesterday. A nice Argon SA1 audio amp with some electrical issue. Took it apart and saw that the 4A250V fuse was blown so started lifting components to find the short. Eventually got to two MOSFETs (model FTA14N50C) that are shorted and when i took them out the short was gone.

      Now i didn't have any replacements of the same model of course but i found a couple with pretty similar spec i thought (K10A60D & K12A50D) and put them in. Also replaced the blown fuse with a 3.5A250V one. Checked another time for short circuit and plugged it in....
      04-12-2024, 01:12 AM
    • playit
      450watt power supply 5v, 3.3v short to ground wire,in output rail ,connectors
      by playit
      hello everyone , working zebronics power suply 450 watts , 5v ,3.3v givin short to ground black wire, also in circuit at output, resistor was charred but shows right values , after removing resistors 39ohms, 51 ohms, there was no short , no continuity beeps with ground , but after replacing new resistors (now i am not switching it on) ,again short still exists . when i put bigger ohm resistor like 100k ohm , no short beeping sound comes , lower ohm resistor gives continuity beeps ,other big ones donest , as its a working psu , i am confused what to remove now or how to go further now .
      ...
      09-02-2023, 02:43 AM
    • 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...