LG 42PT350R clicking problem fixed but still doesn't turn on

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • buchman
    Badcaps Veteran
    • Aug 2015
    • 283
    • greece
    #21
    Re: LG 42PT350R clicking problem fixed but still doesn't turn on

    When I plugged everything together and turned the tv on, I heared a buzzing noise out of Z-SUS and Y-SUS boards.

    Once I heared that buzzing sound out of one of the IGBTs or transistors on the z-sus and then I found out that a couple of them were shorted.

    yesterday, before I plugged everything in, I checked for shorts and there weren't any shorts but I heared the buzzing sound.

      Comment

      Previous 1 2 template Next

      Related Topics

      Collapse
      • B0r1s
        Samsung UE49KS7000SXXH - fast clicking sound in standby mode
        by B0r1s
        PSU - BN44-00878A

        Symptoms:

        The TV turned itself off, and I haven't been able to turn it back on. The standby voltage was unstable and lower than it should be.
        A weak clicking sound was coming from the transformer.

        Video with clicking sound:https://www.youtube.com/watch?v=lAduhjNtqCA

        Progress:

        After the transformer, I measured four Schottky diodes. DM862C and DM864C diodes readings were 003 in both directions. After detaching them from the circuit and measuring them, DM864C was the shorted one. These Schottky diodes are SB550.I...
        01-17-2023, 04:58 PM
      • legg
        LG 42PC3 buffer output doesn't follow YSUS
        by legg
        LG42PC3D -UD originally with green lamp but no display or audio.
        Owner says was working, then went 'pop'.
        All 5V caps bulging. replaced.
        All PSU output voltages within spec but -Vy is low on YSUS.
        One of three parallel fets between SUS_OUT and SUS_DN is zenering,
        eventually shorts DG. Replaced all 3 - -Vy now OK.

        Y scan buffer test point does not follow YSUS output below -50V

        Note: This unit seems to expect YSUS output to park at -Vy in between
        drive signal pattern periods. A replacement drive signal board confirms this....
        11-18-2021, 11:49 AM
      • slimmy182
        [SOLVED] M1 MacBook Pro clicking sound logic board 5V no power on A2338 820-02020
        by slimmy182
        Hello, I bought this Mac from a friend, he said that it simply stop working. The MacBook looks very clean but does not power on, stuck on 5v 0.42A, and sometimes display 5V and 0A (then 0.071A and again 0A).

        I opened it looking for some problem, it was not touched before for sure and the board is very clena, no spot of corrosion at all from what I can see. Voltage on multimeter of the board off the case it's the same, 5V 0.42A. But then I noticed this "clicking sound" come from the board ( I attached here the audio file).

        Looking on google I found this:...
        01-14-2023, 11:55 AM
      • Truncatedhose
        Help repair this relic? Philips 42PF7220A/37, pulsing buzz from YSUS
        by Truncatedhose
        Greetings all!

        Originally this set had the usual messed up video symptoms such as: horizontal lines, weak, grainy video, bottom and top of picture differ in intensity of problem. It also seemed to slow to turn on or show the messed up picture.

        Seemed like must be YScan/buffer board failure. Ordered buffer boards from my distributor which were supposed to be original/new and also from another distributor, I ordered the YSUS because I wanted to replace it for preventative maintenance. (also, the YSUS had a bulged cap, so there was even more reason to suspect it could...
        07-04-2018, 10:59 AM
      • beetle1303
        Carver CM-1090 - Power relay clicking on & off, then fuse blown after 20-30 seconds of power cycling.
        by beetle1303
        I gotten a Carver CM-1090 amplifier from a friend who has kept it in storage for decades. Opened it up, thick layer of dust cumulated everywhere. Vacuumed it semi-cleaned, and blown off as much as possible the remaining dust. This is a 220V version.

        On initial powered up with nothing connected - it works with all the lights and button indicator lit up as pressed, etc. I then powered off, connected a CD player into the CD RCA input and powered it on. It seemed to work for a short while and when I turned the volume up and down to see the the VUs works, the power started to clicked off...
        3 Photos
        01-13-2025, 08:49 PM
      • Loading...
      • No more items.
      Working...