TV Repair Questions? Ask a TV Technician for Answers ASAP
Let's try a couple things so we can narrow this down. Make the room as dark as possible, and turn the TV on. Though the screen is black, can you see a faint glow coming from it, like the backlight is working? It might appear to be glowing slightly… dark gray.
The best I can describe it...there appears to be a half screen of noticeable difference when the power is switched on and off. It only appears to go from black to dark, dark gray.
That appears to be the case when the TV power is first turned on. When the power is turned off the bottm 3rd of the screen shows a difinitive line with the somewhat lighter contrast. Then it goes to all black.
Ok, thank you. Good description. Is this something you plan to repair yourself (I can help), or do you need a diagnosis and cost on repair?
Dan, I checked it out when I got home last night and here is exactly what it does: Tuned power on and after 5 seconds the entire screen lit up to a dark, dark gray and in the upper right hand corner displayed the input type in a small blue box. This all lasts about a second & then the screen goes black. In addition to the input display there were times when the lower left part of the screen displayed the input options when the power was turned on. Not always tho and this only lasted a second & then black.
If I have assistance isolating the defective component and providing I can get a replacement part I could probably do it myself. If not I guess I'd like your diagnosis and repair estimate.
Thanks a million Dan! I will check into it when I get off work tonight. Will this file still be open if I get back to you tomorrow?
Good morning Dan, Here is what I saw on the power supply board.
The largest capacitor on the board (200V/150 uf) is definitely puffy on top. The location of this capacitor is C502 on board #CEH434A.
Could this be the culprit ?
The rest of the capacitors look to be completely flat on top.
Turn the TV on. Then hold a flashlight very close to the screen and look for faint images, shadows, or movement of what should be displayed on the screen. You can try to bring up the TV menu, too... so you'll know what to look for. Can you see anything?
I'll have to do this when I get home tonight. I will let you know the results on Thursday. The only button for functions on the side of the set that work appears to be the power button. I have tried to change the input selection on both the set and the remote without much luck. The one second blip that appears in a blue box in the upper right hand corner of the screen displays PC.
Good morning Dan, no image, shadow or movement on the screen with the flashlight....time for the round file???
I think we'll just cut our loses and get out of this headache.
I understand, and you're welcome!