LG 50PT350 power failure

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • tech2014
    Badcaps Veteran
    • Aug 2014
    • 807
    • Canada

    #1

    LG 50PT350 power failure

    I have an LG plasma tv with a power failure. The power comes on, but the standby LED stays solid red. I narrowed it down to the main board. I get all my voltages, including VA and VS. For some reason, when I disconnect the main board from the P/S, the voltages are all present on the p/s, YSUS and XSUS. I used the flow chart in the service manual and it says to check flash memory.

    Has anyone ever encountered this problem? Is it a faulty flash chip.
    The customer did say that the tv stops working after a lightning storm and the main breaker blew. Could this have erased the flash memory?

    Sorry I can post pics my email is acting up.

Related Topics

Collapse

  • PantherDave
    Microsoft Surface Pro (5th gen) model 1796 - no power
    by PantherDave
    Hi all!

    I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅

    I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
    https://www.badcaps.net/forum/troubl...-hardware-devi...
    05-29-2024, 02:01 PM
  • GLISIT
    Asus Probook P5440UF-XB74 power issue
    by GLISIT
    Hi all,

    TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!


    I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!

    A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about...
    01-16-2025, 02:29 PM
  • JDC
    (SOLVED) - ONN 100012588 No Power, Then Rebooting After Main Board Change
    by JDC
    ONN 100012588
    Issue: No Power, Then Rebooting After Main Board Change

    Short answer: replace main board and power board
    Technical answer: replace main board and Q306 & Q307 on power board.

    Long answer:

    TV wouldn't turn on. Power switch was fine which means the main board isn't processing the power on signal. Replaced main board. TV turns on now but randomly reboots. Bad main board? EEPROM? Tried to pull main board and got a shock touching the corner of the board. That's weird. C334 (450V 10uf) capacitor is still holding a high charge....
    07-15-2022, 07:39 AM
  • shovenose
    Ubiquiti Unifi PoE Switch US-8-150W Power Supply Failure
    by shovenose
    Got this one for free because, well, it no worky.

    A little research and there are tons of complaints all over forums/the internet about premature failure of these switches. The observation everyone makes about these is "they run hot" and failure occurring as soon as 13 months, right out of warranty, of course.

    Upon removal of the cover I found a G0398-15011480A power supply that, when plugged in, was making a constant ticking noise. Multimeter confirmed the PSU was the issue. Output was cycling between 0 and about 20V. With output disconnected it sat around...
    08-11-2021, 01:26 PM
  • sam_sam_sam
    DVR camera recorder switching power supply capacitor failure really
    by sam_sam_sam
    These cheap non brand capacitors at it again

    Last night we had a power outage [ long drawn out trying three to come back up before going out completely ] and when I went to turn the DVR camera recorder back today no go 3 bad capacitors ( one capacitor no ESR reading on DVR board the other 3 capacitor on the power supply board over 40 ohm this is not a misprint ) on the external switching power supply and one capacitor on the DVR camera recorder board where the power supply that goes to the hard drive disk is

    Well at least I have the cameras back on line I to try the...
    01-22-2022, 06:28 PM
  • Loading...
  • No more items.
Working...