Vizio VP322 Plasma - successfull recap, then dies during 24 hour burn-in

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • DocStupid
    New Member
    • Dec 2006
    • 1
    • USA

    #1

    Vizio VP322 Plasma - successfull recap, then dies during 24 hour burn-in

    Hi,

    Vizio VP322 Plasma.
    Totally dead, no signs of life.

    2 buldging caps in power supply - 3300uf, 10V, Samwha WB
    The other usual suspects look good.

    I've recapped several of these TVs with success.
    All would light up the VIZEO badge, but not turn on.
    This one is different, totally dead.

    So...
    I replaced the visably bad caps with 2 temporary used caps to check it out.
    (3300uf, 10v Nichicon PW)

    SUCESS! Run it for a couple of hours.



    So lets fix this right...
    Replaced the following caps with Nichicon HE from Digikey:
    C233, C234 - 3300uf, 10v - bulging
    C204, C205 - 1000uf, 25v
    C236 - 1000uf, 10v
    C201 - 47uf, 100v
    C238 - 470uf, 10v

    Note - C204 &C205 - 12.5mm dia instead of 10mm, ordering error by me.
    A bit close to the heatink, but not touching.

    Put it back together (again), and time for 24 hour burn-in.
    It ran for about 8 hours before I went to bed.
    Next morning.... DEAD :-(
    No lights, no clicks, no nothing.



    I think I have a bad mainboard, with a shorted Vstandby line.
    Unplug the mainboard from the power supply,
    I get 2 relay clicks when I plug in AC.
    And get Vstandby = 5.1 volts.
    Plug in the main board, and Vstandby = 0
    Also, no relay clicks when plugging in AC.

    Unplugging/plugging the plasma drive board has no effect on results.
    (dont know what to call this board)



    Any thoughts on why this ran great for over 8 hours, then died?
    Seen this before?

    Thanks

Related Topics

Collapse

  • brconta
    MacBook A1502 EMC 2835 820-4924-A dies when installing firmware update
    by brconta
    Hello,
    I have a macbook Early 2015 A1502 EMC 2835 820-4924-A.
    Whenever I try to update the system the device dies after reboot. It only comes back to life if the battery is disconnected, and then connected again (energy drain). Apparently the firmware update fails.
    I can install High Sierra normally, but I can't install a newer one.
    I can use a disk with a newer system that was installed on another machine.
    I've already tested another chip and another bios file, but no effect.
    Boot ROM: MBP121.0177.B00
    SMC: 2.28f7
    I've tried the procedure...
    11-02-2021, 04:47 PM
  • kotel studios
    Compaq series PDP-124P PSU - dies after a split second
    by kotel studios
    Hi

    I am quite baffled at this PSU that came out from an dead HP d530 (asus P4SD). Tested all the common failed components, all are fine. D2/3 are both fine. Not shorted in any way. Recapped the whole 5VSB board and the PSU came "back" from the dead (earlier there was a short from neutral to earth, went away disassembly). Now even with 5 load HDD's it's still turning off after a split second. All diodes seem to be fine. Caps are OST, which IMO rarely die. There is 3.3v on PS_ON and 5V on 5VSB. Removed most of the glue there was (pictures don't show it). The traces that look...
    12-19-2024, 01:15 PM
  • fiveseventy
    RX570 dies completely, then recovers.
    by fiveseventy
    Hello all,

    I have a Sapphire Radeon RX 570 Pulse ITX 4GB (single fan) which has started misbehaving recently.
    The card was bought used maybe 5 years ago and has worked without issue until recently.
    I have no reason to believe it has been worked on or physically damaged.


    For periods of time it will be 100% perfect.
    Perfect temperatures, no glitches or artefacts, solid FPS.
    I can game, run benchmarks, do whatever without any problem.
    I can reboot the machine as many times as I like and nothing changes

    however, most times...
    06-22-2024, 05:29 AM
  • Fusion_de
    Samsung LE40B750 backlight dies after a while
    by Fusion_de
    Hello dear Badcaps gurus,

    I was hoping someone could help me on my fault finding missing.

    I saved an old, "broken" TV that my parents wanted to throw out from the recycler as I´m a strong believer in fixing stuff instead of throwing it out.

    The patient is a Samsung LE40B750.
    The symptom is "screen going dark after a while". The sound is still fine when it occurs.

    Its not the signal source. First tests show its the backlight that dies. If I use a strong flashlight I can see the picture.

    The...
    06-07-2022, 12:39 AM
  • echothegamer
    Macbook A1466 dies when charger disconnected
    by echothegamer
    Hello all,

    Working on my wife's 13' Macbook air. It's been in a box since she upgraded but I figured it could be good practice.

    Details:
    Macbook 13' A1466
    Board (820-3209-A)
    Battery OEM 7.3v 50Wh 6700 mAh (020-7379-A)

    Pictures below of Boardview and schematic...

    I don't know how to test the voltage on a MacBook battery. I just assumed it had an enable pin but the best I could read was 300 something mV poking around the battery connector.

    It's an older model and it is very likely that battery has become...
    10-28-2023, 12:00 PM
  • Loading...
  • No more items.
Working...