32MF338B blank!

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • MdPhoenix
    Senior Member
    • May 2010
    • 50
    • USA
    #1

    32MF338B blank!

    I'm familiar with this situation. Turn on TV. Power light comes on. Brief display on screen then blank again. Generally seems to be an inverter issue. Many times it's simply bad caps, and sometimes a couple transistors.

    Looking at the board, it has dark burn spots on the component side. Flipping over the power supply board I find what appear to be regulators coinciding with each of the burn marks. No caps appear to be bad.

    I'll get up pictures tonight, but wanted to see if anyone else has experience with this unit.

    Thanks!
    Tags: None
    • MdPhoenix
      Senior Member
      • May 2010
      • 50
      • USA
      #2
      Re: 32MF338B blank!

      Bump?

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: 32MF338B blank!

          Pictures of the problem suspects?
          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

            Previous template Next

            Related Topics

            Collapse
            • ttmi100x
              HANNSG Hi221 -- 2 secs to black feat. CCFL flicker & "burn" marks on power board
              by ttmi100x
              Greetings everyone,


              I have a HANNSG Hi221 monitor that exhibits two seconds to black issues (backlight goes off, display is still on as confirmed by shining a flashlight on it) with some additional oddities...


              The monitor failed on me with a standard "2 seconds to black" some time ago prompting me to initially replace most of the electrolytic capacitors (some of them were bulging/leaking).
              Things kinda sorta worked for a night, then the problem returned along with some flickering and "buzzing" noises.

              Upon closer inspection...
              "Burnt" resistor
              6 Photos
              07-31-2024, 06:36 PM
            • howardc64
              Insignia NS-43D420NA20 backlight on no display - LCD panel burn failure
              by howardc64
              Eventually discovered a burn mark near lower corner of LCD. Here is a summary
              • Backlight on, no image
              • Disconnect right buffer board (view from front), left side display comes on
              • Masked off pin 7+8 (both ~12,5v on both left and right buffer board) from t-con to right buffer board (view from front) display works but have some lines
              • Buffer board is pretty simple
              Removed the front bezel to examine edge of the glass. Found burn mark on lower right (view from front). Plastic bezel covering the burn mark region shows heat signature on the inside surface facing the LCD panel. Last 2 pics. Bright...
              07-11-2025, 04:04 PM
            • hasel17
              CH341a can erase and read but can't write and blank check
              by hasel17
              So I am trying to repair broken thunderbolt FW on X1 Yoga Gen 2. The EEPROM chip is WINBOND 25Q80DVNIG. I already do a back-up and erase. But when I try to wrote new FW, it was successfull, but when I tried to read it, it still blank. when I try to do a blank check, it gave me instant error in address 0. I already tried two CH341A, already did the 3.3v fix mod, using AsProgrammer, NeoProgrammer, Colibri, and CH341A 1.29. But the problem still occurred. What I did wrong here? Can anyone help me? Thanks in advance. Here is the log in Colibri :

              Code:
              Checking for blank...
(Press
              ...
              10-26-2023, 06:20 AM
            • RetroComputingGrotto
              Hanns.G Hi221 Monitor - Works For A Second & Then Blank Display
              by RetroComputingGrotto
              I've got a Hanns.G Hi221 Monitor that works for a moment and then the display goes off but the power LED indicator remains on. If you power it off and back on again it does the same thing, it comes on and then the display goes blank. From a cold start it takes 10 seconds or so before the display goes blank but if you turn it off and then back on again after it already being on it goes blank a lot quicker so I'm assuming something is getting hot which is causing the display to go off.

              I've uploaded a video of it happening on YouTube:



              I've taken the monitor...
              01-11-2024, 05:37 AM
            • Chrissygizmo
              Panasonic TX-48CX350B backlights but white screen , blank screen
              by Chrissygizmo
              Hi all, I’ve got a problem I hope someone can help me fixi.
              I have a Panasonic TX-48CX350B tv , it powers up ok but the screen is blank, the backlights are working, there’s nothing else though, no picture or sound. I’m not sure what the fault is called whether it’s BLANK/ BLACK/ or WHITE SCREEN I’ve actually came across this before on a similar tv but just ended up scrapping it, I will upload pictures of the boards etc , if anyone could help me I would really appreciate it...
              01-11-2025, 03:18 PM
            • Loading...
            • No more items.
            Working...