lg 50ps3000 flaashes then screen goes off

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • wreksta
    Badcaps Veteran
    • Aug 2013
    • 508
    • england
    #1

    lg 50ps3000 flaashes then screen goes off

    Hi all I have a lg 50ps3000 thAt had red haze ordered a repair kit from ebay
    I fitted it and now tv will turn on and flash the screen once
    If I disconnect the zsus from the control board tv will come on flashing a black screen
    With a red lined alternatating across the screen

    Any ideas people
    Tags: None
    • wreksta
      Badcaps Veteran
      • Aug 2013
      • 508
      • england
      #2
      Re: lg 50ps3000 flaashes then screen goes off

      Anyone help could the ldvs control board cause it

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: lg 50ps3000 flaashes then screen goes off

          Try jumpering EXT AUTO GEN on control board with the LVDS cable out - do test patterns do this - pic or video of screen with fault would help too.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • wreksta
              Badcaps Veteran
              • Aug 2013
              • 508
              • england
              #4
              Re: lg 50ps3000 flaashes then screen goes off

              Hi tom can't find the service man for this one any help on which pins there's a plugin type connector with 4 pins above the the word ex auto gen

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK
                  #5
                  Re: lg 50ps3000 flaashes then screen goes off

                  Pic of it?
                  What's the panel model number for example PDP50J3#### (not same as "50PS3000")

                  SM:
                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                    Comment

                    • wreksta
                      Badcaps Veteran
                      • Aug 2013
                      • 508
                      • england
                      #6
                      Re: lg 50ps3000 flaashes then screen goes off

                      Need help with this ext auto gen as there 4 pins

                      Panel is pdp50h30001

                        Comment

                        • ahmednesar
                          New Member
                          • Jan 2014
                          • 3
                          • Saudi Arabia
                          #7
                          Re: lg 50ps3000 flaashes then screen goes off

                          Lg 42pg20r-ta
                          ===========
                          hi i am ahmedn esar from saudi arabia . please any one help me my LG lcd tv (Lg 42pg20r-ta full display red color) sum system change now not open power on green light display black how to solve give solutions.

                            Comment

                            • ahmednesar
                              New Member
                              • Jan 2014
                              • 3
                              • Saudi Arabia
                              #8
                              Re: lg 50ps3000 flaashes then screen goes off

                              Lg 42pg20r-ta
                              hi i am ahmed nesar from saudi arabia . please any one help me my LG lcd tv (Lg 42pg20r-ta full display red color) sum system change now not open power on green light display black how to solve give me solutions.

                              my email :ahmednesar33@gmail.com

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK
                                  #9
                                  Re: lg 50ps3000 flaashes then screen goes off

                                  Picture of the control board with this 4 pin header?
                                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                    Comment

                                    • wreksta
                                      Badcaps Veteran
                                      • Aug 2013
                                      • 508
                                      • england
                                      #10
                                      Re: lg 50ps3000 flaashes then screen goes off

                                      This here sorry bout pic

                                        Comment

                                        • tom66
                                          EVs Rule
                                          • Apr 2011
                                          • 32560
                                          • UK
                                          #11
                                          Re: lg 50ps3000 flaashes then screen goes off

                                          I don't know how to activate that one I'm afraid, not seen that before, it might be a combination of pins, or you need an external jig from LG.
                                          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                            Comment

                                            • freakaftr8
                                              Badcaps Legend
                                              • Oct 2012
                                              • 3743
                                              • USA
                                              #12
                                              Re: lg 50ps3000 flaashes then screen goes off

                                              You Can try jumping The Two End Pads I Believe Look At The Traces On The Board. Take a good pic of it and post
                                              Last edited by freakaftr8; 01-18-2014, 04:33 PM.
                                              Did I leave the soldering iron on?

                                                Comment

                                                • freakaftr8
                                                  Badcaps Legend
                                                  • Oct 2012
                                                  • 3743
                                                  • USA
                                                  #13
                                                  Re: lg 50ps3000 flaashes then screen goes off

                                                  AActually now looking more into it I believe that it requires a test jig like tom66 suggested.
                                                  Did I leave the soldering iron on?

                                                    Comment

                                                    • wreksta
                                                      Badcaps Veteran
                                                      • Aug 2013
                                                      • 508
                                                      • england
                                                      #14
                                                      Re: lg 50ps3000 flaashes then screen goes off

                                                      Another control board arrived and picture was real messed up very bright and speckled redish for a while now tv just turns with quick screen flash on off again on you can hear the zsus buzz then stop

                                                      All voltages from psu to ysus and zsus are correct to panel could ghid bright picture have damaged a board I checked zsus mosfets they seem fine I cant read there resistance though

                                                      hrlp
                                                      Last edited by wreksta; 01-29-2014, 12:50 PM.

                                                        Comment

                                                        • tom66
                                                          EVs Rule
                                                          • Apr 2011
                                                          • 32560
                                                          • UK
                                                          #15
                                                          Re: lg 50ps3000 flaashes then screen goes off

                                                          I think what causes this failure is the control board going bad - capacitors.

                                                          So if you put a dud control board into a set it could blow the Y- or Z-sustain. Usually the Z-sustain goes first.

                                                          Bright picture suggests VE voltage too high followed by a sustain board failing.

                                                          You may need a scope to check waveforms out of each board and see if there are any anomalies.
                                                          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                                          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                                            Comment

                                                            • wreksta
                                                              Badcaps Veteran
                                                              • Aug 2013
                                                              • 508
                                                              • england
                                                              #16
                                                              Re: lg 50ps3000 flaashes then screen goes off

                                                              I have correct va and vs from psu to both boards theres no mention of ve on the panel or where to tune from

                                                              I have all new caps on other control board I can replace them if need be is there a way to get a pic on this model without zsus

                                                              Recap control board can make tv turn on flash and kill screen

                                                                Comment

                                                                • tom66
                                                                  EVs Rule
                                                                  • Apr 2011
                                                                  • 32560
                                                                  • UK
                                                                  #17
                                                                  Re: lg 50ps3000 flaashes then screen goes off

                                                                  Sorry Ve is Samsung/Panasonic, on LG it is Vzbias or Vzb. On Z-sustain.
                                                                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                                                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                                                    Comment

                                                                    • wreksta
                                                                      Badcaps Veteran
                                                                      • Aug 2013
                                                                      • 508
                                                                      • england
                                                                      #18
                                                                      Re: lg 50ps3000 flaashes then screen goes off

                                                                      Thats not written down on panel but I could not get it down past 192v on zsus

                                                                        Comment

                                                                        • tom66
                                                                          EVs Rule
                                                                          • Apr 2011
                                                                          • 32560
                                                                          • UK
                                                                          #19
                                                                          Re: lg 50ps3000 flaashes then screen goes off

                                                                          Way too high, normally around 90~100V. See here:


                                                                          Search 50H3 panel to find how to read labels and check Vzb, -Vy and Vsc voltage.

                                                                          Too high will "overbright" panel. On well made TV, it will shut down Vs supply due to overload, but these LGs just love to fry stuff instead.
                                                                          Last edited by tom66; 01-29-2014, 01:15 PM.
                                                                          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                                                          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                                                            Comment

                                                                            • wreksta
                                                                              Badcaps Veteran
                                                                              • Aug 2013
                                                                              • 508
                                                                              • england
                                                                              #20
                                                                              Re: lg 50ps3000 flaashes then screen goes off

                                                                              That s what its doing shutting it down the picture that is what could bd causing fhe high vzb

                                                                                Comment

                                                                                Previous 1 2 template Next

                                                                                Related Topics

                                                                                Collapse
                                                                                • Ryan.man
                                                                                  Macbook 2017 with touchbar (A1706) won't turn on after removing the screen
                                                                                  by Ryan.man
                                                                                  Hello everybody! Posting this in hopes somebody has some expertise that leads to a clear path of troubleshooting that saves me a lot of time!

                                                                                  My macbook has the flex cable problem, the one that prevents the screen turning on. Ive been dealing with this for the last 3 years. Last year it went dead and I managed to fix it following youtube tutorials. But my fix wasnt the best, the problem returned a month later. This week, it went dead again. I again tried to fix it.

                                                                                  This time the original cable broke too close to the screen, it can't be fixed without tearing the screen...
                                                                                  02-04-2025, 12:23 PM
                                                                                • smic717394
                                                                                  iphone XS turns off when press on screen.
                                                                                  by smic717394
                                                                                  Hi,

                                                                                  I have a iphone XS that came in for a screen replacement, the screen was badly cracked, and inside missing scues, on the back of the screen still the blue protector, the screen was a LCD. So we replaced the screen and all good, installed the screen and we noticed that pressing the screen with a bit of force but not excessive, the phone dies. After plugging the charger it turns back on, but again if you press it it dies. I open the phone again, and I can't see anything major, with the phone open, if I press on the logic board, battery, charging board, or even putting pressure on...
                                                                                  07-25-2024, 10:16 AM
                                                                                • Chrissygizmo
                                                                                  Samsung UE55JU6800K half screen dark
                                                                                  by Chrissygizmo
                                                                                  Hello everyone, I’ve just been given a Samsung UE55JU6800K smart tv as it had white spots on the screen due to the led lenses falling off. After refitting them & putting the tv back together I thought it was a nice easy fix for a free bedroom tv , then I tried it before screwing the back into place. I realised that the right side of the screen was darker than the other side, I removed the screen again as I thought the backlights had failed but they are fine.
                                                                                  I put the screen back in place & turned it back on . The screen seemed to be ok again but different screens on the same...
                                                                                  02-10-2025, 12:33 AM
                                                                                • ipatch
                                                                                  ipad pro 9.7" blew a SMD component while replacing the screen 🤦‍♂️
                                                                                  by ipatch
                                                                                  i have an ipad pro 9.7" (1st gen) A1674 where i replaced the screen, but never attached the screen to the frame/chassis (glued down) due to the ipad being previously dropped so the new screen would never fit in the frame properly. so i need flex/bend the chassis to eventually fix the new screen in properly. so i temporarily just applied blue tape around the edges of the screen to keep it in place. when watching videos with the ipad the screen started flicker, so i though maybe the new quasi cheap amz screen i purchased was going out. so i disconnected then reconnected with power still on,...
                                                                                  08-24-2024, 02:36 PM
                                                                                • FreakyMex
                                                                                  Trouble to identify part (Lunii screen) for replacement
                                                                                  by FreakyMex
                                                                                  Hello guys. I'm a complete noob in electronics. I'd like to repair my child Lunii's (a "story box"), basically an audio player that allows the childs to choose between several options the places, characters, objects of the story, and then play a story according to the choice of the child. There is a screen that display the selected option before each choice. The Lunii fell and the screen is now broken.
                                                                                  I'd like to repair it (probably just have to change the part, because the lunii still works perfectly fine) but I can't manage to identify the part/order it online. Do you have any...
                                                                                  https://photos.app.goo.gl
                                                                                  02-17-2025, 01:16 AM
                                                                                • Loading...
                                                                                • No more items.
                                                                                Working...