Sony PVM-2730QM no picture

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Rotary
    New Member
    • Aug 2021
    • 2
    • Germany
    #1

    Sony PVM-2730QM no picture

    Hello,

    My beloved PVM died :-(. Audio and controls are working, but no picture.
    When I switch it on I can hear the typical high voltage noise, then its gone.

    After inverstigating more deeply it weems the protection circuit for the horizontal driver kicks in but i have no idea where to look.

    What i found out is a missing +200V and +40V, wich seems to be driven from H-driver.

    Very strange is, on IC1501 i get a voltage on pin 8, but it should be 0V. Since this pin is only pulled down by 33k and 4.7uF wich are both ok. Is this pin indicating an active protection circuit ?

    I´m happy for every hint on this problem.

    Thank you
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • CyberPhoenix
      Issue with picture quality of Sony bravia TV
      by CyberPhoenix
      Hello, Last week I bought the 50" Sony X80j tv everything was working fine, untill I plugged the tv in a ups power supply 650va the tv remote control became unresponsive and the TV became laggy after a while the picture quality isn't the same as before the tv seems less brighter and the picture is somehow blurry, people's faces don't look as natural as before, there is a mini orange-pink tint to the edge of people's faces especially in NETFLIX Dolby Vision like in One Piece ep1 Alvida skin tone, my intention was to protect the tv but something went wrong I checked the ups with a multimeter,...
      Badcaps Electronics Repair Forum & Schematic Search - Badcaps
      https://www.badcaps.net
      01-22-2024, 02:08 AM
    • noisykid
      Sony XBR-85X950G Gray horizontal lines and vertical picture shift diagnosis?
      by noisykid
      5.5 year old 85 inch Sony Bravia X950G started showing gray horizontal lines across the bottom of the screen and the picture shifts slightly vertically when it happens. The lines sometimes get bigger/smaller vertically and bounce back. See the video for the problem. It seems to be happening after it warms up after an hour or so. Happens regardless of source. Right now there's nothing but power cable connected and it's happening. We did hook up a new Nintendo Switch to our HDMI switching receiver today, and played for a while with no issues, but this problem didn't occur til a few hours later while...
      12-30-2024, 07:15 PM
    • tree5656
      diagnosing sony XBR-75X900H. NO PICTURE
      by tree5656
      This tv is not even 3 years old. its a sony XBR-75X900H, it was like a flashbang went off suddenly, tv faded to black and no picture. backlight is on. tried to do the power cycle, factory reset. i get beeps from remote if i tap up/down but no picture. how can i determine if its the panel or a board? i have replaced boards before im just not sure what the issue is here. sony said nothing they can do and only suggested to find a local repair shop. please guide me here
      11-09-2023, 04:55 PM
    • DKWS89
      Sony XBR 49x900E - Sound and backlight on but no picture
      by DKWS89
      Hey Guys,

      So a few months ago my Sony XBR 49x900e TV screen stopped displaying the picture but the backlight comes on and I still get sound when I use the remote and navigate to certain apps. I haven't checked anything with the meter yet but started with ordering some replacement boards. I've tried replacing the BMKS board (used from ebay) and also completed the firmware upgrade based on Nicks TV repairs youtube video. I've also replaced the TCON (twice) and PIB.

      All of these changes have resulted in the same issue with no picture. I've also tried disconnecting the ribbons...
      12-14-2023, 04:30 PM
    • ronni
      Sony KD-43XE8005 with sound, backlight, no picture
      by ronni
      I have a Sony KD-43XE8005 with no picture on the TV when powered on. Audio and backlight work ok when powering on. Solid white indication light showing on front of tv bezel.

      When removing the left hand ribbon cable from the T-con board, a white image is displayed on that half of the screen and a black screen is shown on the right. If I gently rub the ribbon cable on the right an image or purple black bars appear. The cable doesnt appear damaged, and if swapped with the other ribbon cable the same flickering symptoms can be seen.

      Removing the LVDS cable results in...
      12-01-2022, 08:44 AM
    • Loading...
    • No more items.
    Working...