60PV450 bad YSUS?

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • silicondt
    New Member
    • Mar 2016
    • 3
    • USA
    #1

    60PV450 bad YSUS?

    Hey all! I have a LG 60PV450 Plasma that stopped working.

    When you turn it on it clicks a few times, the red light comes on. Then it goes off. No video during this. The YSUS is also making a buzzing noise.

    I took the back off and tested a few things. If the YSUS is plugged into the power board, the voltages are not correct on VS-TP and VA-TP. BUT if I unplug the YSUS from the power board the voltages are good and stay on.

    The fuse on the YSUS was out so I re soldered another fuse (same fuse part) on but it still buzzes and no video.

    I also tried the test pattern by putting a paper clip in the 2 little holes on the control board and unplugging the blue ribbon cable. I got no test pattern.

    If the YSUS is bad would you get no test pattern no matter what?

    Also I tested the Y buffers for shorts and did not find any.
    Tags: None
    • sordids999
      Badcaps Legend
      • May 2013
      • 2161
      • uk
      #2
      Re: 60PV450 bad YSUS?

      Posting pictures of the back of your tv showing the boards with clear pictures may help you more with fixing your problem

        Comment

        • ReeceyBurger123
          Never Give Up !
          • May 2014
          • 7325
          • Britain
          #3
          Re: 60PV450 bad YSUS?

          Hi have you tried unplugging the top buffer and seeing it comes on with lower screen image ?
          Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

          https://www.facebook.com/Telford-Tel...7894576335359/

            Comment

            • tech2014
              Badcaps Veteran
              • Aug 2014
              • 807
              • Canada
              #4
              Re: 60PV450 bad YSUS?

              I had a similar tv with buzzing coming from the YSUS. It was a crack on the panel. If you get the voltages with YSUS removed, its most likely the YSUS, or possibly a buffer board.

                Comment

                • silicondt
                  New Member
                  • Mar 2016
                  • 3
                  • USA
                  #5
                  Re: 60PV450 bad YSUS?

                  I took out both Y buffers and same thing. When the YSUS is plugged into the power board the voltages are wrong on VS-TP and VA-TP and buzzing on the YSUS. When I unplug it the voltages on VS-TP and VA-TP are good but no video either way.

                    Comment

                    Previous template Next

                    Related Topics

                    Collapse
                    • PlasMatt
                      LG 60PV450 Possible Bad YSUS Need help confirming Diagnosis
                      by PlasMatt
                      I have an LG plasma that after reading through a bunch of posts and doing some testing I believe has a bad YSUS board. The problem is that that doesn't make sense to me for some of the symptoms. The problem started yesterday. While watching a movie the TV just shut down like I pressed power. I have it hooked to a PC and use RS232 to turn it off and on so I thought maybe something had glitched there. I turned it back on and finished the movie with no problems. The same thing happened today so I checked logs to see if something in the control glitched and sent an off command but it didn't, After...
                      09-20-2025, 06:50 PM
                    • corrize
                      A funny fuse story – Lumix LX100 II
                      by corrize
                      Hello, I disassembled this dead camera, and found this WTF… Two fuses soldered one above the other !
                      I was pretty sure nobody touched it before, but that can't be from factory. There is flux, and capacitor is probably missing.
                      The other weird thing : the fuses are « G » fuse : (0.75A – 8V), seems very low. The original fuse should be « O » : (32V 2,5A).
                      There is « O » mark beside. All fuses have the same mark letter on main board. So, I can deduce it's a « O » fuse.
                      And this correspond to the issus I saw : when I plug the battery, I measure the voltage dropping...
                      10-19-2023, 09:58 AM
                    • nono34
                      Hisense stuck in Colors cycle like test pattern.
                      by nono34
                      Hello,

                      I accidentally changed the project ID in the service menu of my Vidaa Hisense 100U7KQ TV. When I turn on the TV, the screen displays an RGB color cycle (test mode???). I contacted Hisense, and they sent me a usb_MTK_9618.EU.bin file, but it doesn't work. I can see that the USB drive is being read, and it flashes for about 10 minutes (the screen remains in the color cycle during the firmware reading), then the TV turns off and restarts, but still in the color cycle mode.

                      I want to mention that the 4GB USB is formatted in FAT32 MBR. I've also renamed the file to...
                      10-24-2024, 04:31 PM
                    • m3tal82
                      Sony Bravia XBR-65x900e Test pattern
                      by m3tal82
                      Hello all,
                      I got this beauty of a 65" Android Smart TV from a roommate whose boss through it out because it didn't work. I've fixed a few TVs before, but was being stupid on this one:

                      Original issue:
                      TV powered down after a minute or so, but picture was fine.
                      Tried replacing main board, which didn't work. I should have just replaced the AC Power board.

                      Months later, I replaced the power board, so I can see the screen. I lost / threw out my original main board, and there is now what I believe to be a defective main board in the TV. My symptoms...
                      04-07-2020, 12:41 PM
                    • chth96
                      How Can I test PWM DM0365R?
                      by chth96
                      Hello
                      I have power adaptor(220V/input, 12V 1.2A/output) which has symptom of fluctuating output DC voltage between 11.5V-12.2V.
                      So I opened its plastic case and when switched it on, I heard constant tik tik sound from inside its PCB.
                      I measured DC voltage between negative and positive pin of the largest capacitor(400v 10uf) and it was measured contant 300V.
                      I also measured ESR value of all capacitors and I noticed that one of capacitor(KMG 16v 470uf), which located in the secondary side, have high ESR value(10 ohm),So I replaced it with same specification NXH capacitor....
                      06-18-2025, 04:14 PM
                    • Loading...
                    • No more items.
                    Working...