Toshiba 32AV502R cycles on/off

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • jimdandar
    Member
    • Jun 2012
    • 22
    • USA
    #1

    Toshiba 32AV502R cycles on/off

    I have a 2009 32" Toshiba 32AV502R LCD TV that after a few minutes, starts to cycle on and off (sound and picture) every few seconds. The green led on the front flashes on, and it seems when the picture starts to appear, it shuts down for a few seconds, then the led comes on, pauses, the picture starts to show, and then it shuts down. I've done an inspection of the caps and nothing stands out.

    When it is cycling on/off, the power button on the tv and the remote will not work. I have to pull the plug to shut it off.

    When I have picture and sound, the 5vdc connections show 5vdc, but as the picture and sound disappear, it drops to around 1.5 vdc and then rises back to 5 when the picture and sound comes back, even if only briefly.

    When it all goes dead for a few minutes, the green power light slowly blinks on and off.

    I've attached a picture of the board.

    Any thoughts? Many thanks.
    Attached Files
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • TR103
      Samsung TV model UE50TU: rebooting, backlight, sound, but no picture
      by TR103
      Hi, I have a Samsung UE50TU with:
      - sound and backlight, but no picture
      - when it arrived, it had a picture for a few seconds
      - it keeps rebooting
      - without ribbon cable between the two panel boards, it does not reboot but I have no picture
      - without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
      - when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.

      - without cable between mainboard and lcd panel and with a jumpered...
      01-22-2025, 04:12 PM
    • Mgiffune
      Samsung UN60EH6000F Black Screen, Backlight and Sound Good. Power Cycle Returns Picture
      by Mgiffune
      I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.

      I ordered a supposedly ‘new' Tcon board this time, and      ...
      06-09-2024, 10:28 AM
    • jord4231
      Toshiba 37AV500A Regza TV good power supply no sound no picture
      by jord4231
      Hi Everyone,

      I'm working on a Toshiba 37AV500A Regza TV.

      The issue:
      TV was working picture and sound went out. Green stand by light stayed on, It will respond to the power button being pressed (goes in and out of standby)
      The TV will very intermittently work for around 40 mins then stop. This doesn't seem to matter if its hot/cold unplugged for a while etc.


      I checked the PSU voltages and everything looked good.
      No bulging caps or signs of heat.

      24v aud = 24.41v
      12v = 11.98v
      5v = 5.062
      p_o/f = Goes high...
      03-29-2022, 09:21 PM
    • Ierwin
      Samsung UE60KU6079 backlight okay mainboard responsive, no picture, no sound
      by Ierwin
      Hello everyone,
      Ive got a UE60KU6079 on the workbench that is giving me some headaches trying to troubleshoot.
      The previous owner stated that there had been white dots on the screen which from the description sounded like some lenses fell of the backlight LEDs.
      He had opened the TV from the back, trying to get to the backlight, supposedly gave up, reassebled everything and gave the TV to me.
      I expected the worst like ripped COF cables or a cracked panel but could not find anything like that yet.
      Anyway I still fully expect that there has been something seriously damaged...
      05-13-2025, 03:31 PM
    • jchang
      Samsung UN70NU6900F no picture and no sound
      by jchang
      Hi all

      I was just given a Samsung TV with the issue. I read various threads and videos and attempted the ribbon tape method to gain an image, but no luck.



      Symptom:
      No picture no sound.
      When I plug in the power cord, Backlight LED turns on for a half second and then turns off. The red LED next to the power button located center bottom flashes 2 or 3 times. When the power button is pressed after, it does the same thing.
      No sound at all.



      What I tried:
      1. I tried unplugging the left or right ribbon...
      01-09-2023, 06:28 PM
    • Loading...
    • No more items.
    Working...