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This problem occurs regardless of the input 75Ohm /RCA /PC C51 and C55 are only in the YPrpB Interface on the Main Board Part 2.This problem occurs regardless of the input 75Ohm /RCA /PC C51 and C55 are only in the YPrpB Interface on the Main Board Part 2.
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The defective LCD TV may have the
following common symptoms: Symptom: No picture on screen but LCD TV
still has sound. Solutions: The problem is cause by defective inverter. Replacing
inverter will solve the problem. Symptom: Screen flash on and off between 1/2 to a few seconds, but power
indicate light stays on and TV still has sound. Solutions: The problem is cause by defective inverter. hope this may help;
The protective circuits are kicking in and shutting down the LCD section. Usually this is because of a fault in the backlight circuit. This is essentially a flourescent light that provides the backlight for the LCD panel. These are not the easiest circuits to diagnose because either they work or not. I have seen bad caps, leaky diodes and shorted transformers cause this. I am not familiar with Grundig sets enough to point to a specific component. There should be a "power" board that contains the supply for the panel. That module should be swapped. If you have access to an ESR meter, you can check the caps using that. Check the diodes with a meter too, although they may test good out of circuit and fail under load.
Keep us posted on your progress. I hope I gave you a few options.
Hello, The fault is in the Capacitors C51 or C55 in LCD drive circuit...Please Try to replace them by yourself and if your not sure contact a service person!!...This will surely solve your problem...!!Thank you...
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My 32' LG LED TV has suddenly lost picture! The sound is all right but the Screen is pitch black. After switching it on the picture flashes for a second and then the screen goes completely black.
? 4:52
https://www.youtube.com/watch?v=IBRE1Dcyxp4
Jan 13, 2012 - Uploaded by Clay Whitehead
TV Has Sound But No Picture Troubleshooting Guide - Duration: 2:30. by Repair.com 472,733 views. 2:30. LG LCD TV REPAIR -NO PICTURE ...
If the TV is older than 3-5 years or do, it is probably an LCD model with a fluorescent backlight. These backlights have issues with the inverter boards and/or the tubes failing over time. This is why newer flat-panels have gone to LED backlighting. Without the backlight, the picture is actually on the screen, but you aren't able to view it because there is no light to illuminate it. These CAN be repaired, but the cost of new TVs makes it almost most cost-effective to upgrade to an LED TV.
If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.
The tv have a long board call a LCD inverter board.This long LCD inverter board is dead.That why,the tv have picture only flashes like a min. than,died and have sound left only.The LCD long inverter board help the LCD screen panel to have a backlight to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish long LCD inverter board for the replacement.
It seems that the "backlight" has gone bad. "Backlight" is the device that allows to see the picture in an LCD TV, when they are about to go bad the symptom that you describe is very usual. It depends on the tv manufacturers and model to expect how long the "backlight" is going to last in a tv.You can shop around for a replacement part and try to do it yourself or take it to an especialized technician. Good luck..
I had the same exact problem.
I removed the bulb and cleaned it. There is a small screen at the top of the bulb and it was covered with dust. Once it was cleaned I replaced the bulb and it solved the problem.
Thanks to those who posted the solutions
There are no loose connections at all...
This problem occurs regardless of the input 75Ohm /RCA /PC C51 and C55 are only in the YPrpB Interface on the Main Board Part 2.
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