Soniq L32V12A 32" LCD won't turn on

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • psmedley
    Senior Member
    • Apr 2012
    • 144
    • Australia
    #1

    Soniq L32V12A 32" LCD won't turn on

    Hi All,

    Got this 32" HD LCD tv from ebay a few months ago real cheap, and finally got around to taking a look.

    Photos attached showing layout.

    Power supply is a Megmeet MIP320FL. No caps appear bulged, but a couple of them test a little high for ESR (tested in-circuit). Caps are a mix of Samxon, CapXon and Aishi.

    Video board is labelled ST306TP-T7 - caps are KLA anda gain, none appear bulged.

    Symptoms are when the power is turned on at the mains, the red standby light on the front of the TV flashes 4 or 5 times, but no response when the power button is pressed on the side of the TV. Remote doesn't work either.

    big connector on the bottom RH side of the power supply has several voltage labels (STB, +5VSB, +5V, +12V) The only one that measures any voltage is the one labelled +5VSB.

    Any suggestions on what else I can check before I end up recapped the PSU as a start point?

    Photos (best I can do indoors right now) are attached.

    Thanks,

    Paul.
    Attached Files
    Last edited by psmedley; 07-01-2013, 03:31 AM.
    Tags: None
    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: Soniq L32V12A 32" LCD won't turn on

      Check BLON (ON/OFF) signal and DIM on bottom right connector:
      https://www.badcaps.net/forum/attach...1&d=1372670781

      Any audio if you connect a source and fiddle with source button?
      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

        • psmedley
          Senior Member
          • Apr 2012
          • 144
          • Australia
          #3
          Re: Soniq L32V12A 32" LCD won't turn on

          Will check that input tomorrow, however note that the standby light does not change colour when the power button is pressed, so I'm not expecting audio.....

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK
              #4
              Re: Soniq L32V12A 32" LCD won't turn on

              Would probably be main board fault then, unless power board output voltages are low or otherwise incorrect.
              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

                • psmedley
                  Senior Member
                  • Apr 2012
                  • 144
                  • Australia
                  #5
                  Re: Soniq L32V12A 32" LCD won't turn on

                  Originally posted by tom66
                  Would probably be main board fault then, unless power board output voltages are low or otherwise incorrect.
                  Checked out the caps on the main board - there are several with marginally high ESR, and several with very high ESR. I'll recap it over the next few days and see how I go.

                  Thanks for the help thus far

                    Comment

                    • LenJ
                      New Member
                      • Sep 2013
                      • 2
                      • Australia
                      #6
                      Re: Soniq L32V12A 32" LCD won't turn on

                      Hi Psmedley,

                      How did you go with the Soniq television?

                      I have the same tv which most times takes a very long time to turn on, when it is faulty, you hear a quick start up tune / jingle but the picture or television sound does not work.

                      Cheers

                      Len

                        Comment

                        • psmedley
                          Senior Member
                          • Apr 2012
                          • 144
                          • Australia
                          #7
                          Re: Soniq L32V12A 32" LCD won't turn on

                          Hi Len,

                          I actually got distracted on some other projects and haven't got back to the tv yet. Based on your symptoms I'd be suspecting bad caps on the power supply...

                            Comment

                            • LenJ
                              New Member
                              • Sep 2013
                              • 2
                              • Australia
                              #8
                              Re: Soniq L32V12A 32" LCD won't turn on

                              Thanks Psmedley,

                              The job got put on the back burner too, but I replaced nine caps on the power supply yesterday and hey presto, $8, problem fixed.

                              Cheers
                              Attached Files

                                Comment

                                • cougar010463
                                  New Member
                                  • Feb 2018
                                  • 1
                                  • Australia
                                  #9
                                  Re: Soniq L32V12A 32" LCD won't turn on

                                  Hi Psmedley
                                  did you ever get your tv sorted
                                  i have the same one with the same problem a friend looked at it and changed some caps and it worked fine for a while then went back to not turning on just showing the stand by red light

                                    Comment

                                    Previous template Next

                                    Related Topics

                                    Collapse
                                    • pajdek
                                      Lenovo Y700-17ISK turn on and off
                                      by pajdek
                                      Hello, i have some issues with my laptop Lenovo Y700-17ISK (motherboard BY511 NM-A541), it started when i turn on the laptop, but the lcd wont turn on, i then connected it via hdmi to tv and screen was ok. So i thought maybe lcd stripe is faulty, i removed the bottom cover, disconnected main battery, reset the cmos by disconnecting battery for 1 min, then slighty move the lcd stripe. Conncted power supply and tuned on my laptop, the lcd turn on, it started to load os, then it turn off, after a second it turn on, then after like 3 seconds turn off again, and so on. Removed power supply, waited...
                                      09-20-2023, 02:49 AM
                                    • RdeveLabs
                                      MSI GF63 THIN 11UCX (MS-16R6) LAPTOP WON'T TURN ON AFTER RESTARTING
                                      by RdeveLabs
                                      To all the members here...

                                      Let me tell you a little bit about what happened to my laptop (MSI GF63 THIN 11UCX model: MS-16R6) that “maybe” you know how to solve this problem.

                                      So before this problem happened, my laptop was running smoothly. When I wanted to restart my laptop, it looked fine at first. But after I waited for this restart process to take a long time, until finally I panicked (because the restart process did not finish plus the laptop screen only showed a black screen), I immediately pressed and held the power button to force the laptop to turn off. But...
                                      05-05-2025, 04:59 AM
                                    • robante15
                                      Acer Aspire 4520 won't turn on after reboot
                                      by robante15
                                      Hello, I have an Acer Aspire 4520 from a couple of decades ago and I want to repair it solely for nostalgia.

                                      It happens that when I turn it on after having been disconnected for a long time, it turns on without problems, it tells me that the BIOS has been reset and that it will load the factory settings, if I tell it to continue, the computer turns on and everything works fine.

                                      The moment I turn it off and want to turn it back on a second time, or restart it and try to start it again, it no longer gives an image, and it no longer responds.

                                      If I remove the...
                                      04-06-2024, 06:50 PM
                                    • masoksian
                                      Dell latitude e7470 not turn on .power buton on off and Run Power problem
                                      by masoksian
                                      Hi everyone,

                                      I am dealing with the problem of turning on and off my Dell e7470 notebook.

                                      The battery charge light is solid white, I press the button, the power indicator and the light on the button are solid for 1-2 seconds and immediately turn off.

                                      The system does not turn on, there is no post.

                                      I removed the RAMs and changed them, changed the battery, RTC battery, AC adapter, removed them and waited, tried again, it does not turn on.
                                      The problem continues in the same way.
                                      I tried to turn on the Fn key, nothing came to the screen....
                                      02-15-2025, 12:08 PM
                                    • dqtech
                                      lenovo x240 nm-a091 wont turn on
                                      by dqtech
                                      i got this laptop with no power issue....i flashed the bios and laptop can turn on and use normally....but when i shut it down and rest for few minute (2-3 minutes), it wont turn on....i have to flash bios again...any idea what is the problem?...when i shutdown and suddenly press power button to turn on, it will turn on normally....problem happen when i rest the laptop 2-3 minutes after shutdown, it will not turn on....i need to flash bios again
                                      board number VIUX1 NM-A091 REV:1.0...
                                      02-07-2024, 01:57 AM
                                    • Loading...
                                    • No more items.
                                    Working...