Have TV Questions? Ask a TV Technician
- Does TV screen glow/ show backlight when turn On the TV?
- Does any graphics appear on screen?
Hello, I'm Shahid. Sorry to hear that you're having trouble with this but I'll do my best to help.
Did you get above info request?
OK, please shine a good flashlight on screen with 45 degree, do you see/ observe a faint/ dim image inside screen while having sound from TV speakers?This test will help to diagnose the problem.
Yes, I'm here and typing the reply takes little time.
No problem, I'll explain how this site works when needed.
I understand screen has no light and did you get my suggestion to shine a good flashlight on TV screen while TV is ON.
You would observe faint/ dim image inside screen with help of flashlight test.
OK, working on it, give me 5 minutes please.
This kind of problem mostly occurs due to power supply board failure that provides different voltage supplies to other circuit boards/ sections of TV, however, some times main processor board where all video inputs are located also found bad. Since TV gives sound output but screen stays black that points out power supply board failure that will be replaced.
Please click following link to view power supply board image and part number info (please cross check the part number written on label pasted on power supply board in TV before ordering the board) that can be used to search/ google to get price info to order it if you have plan to do-it-yourself..
If you are not comfortable working on it yourself then you may please use following link to get list of TV repair shops in area which will help to get repair quote around $200 to $250...http://www.tvrepairpros.com/I'm sorry there is no easy or quick fix for this problem and it is definitely hardware failure that needs defective board replacement to resolve the issue. I trust my input will help you out to make decision about this TV repair or invest that money on new replacement TV. If you have any additional questions, feel free to ask. If you're satisfied, please rate me a 5-star at the top of your page. Thank you.
Let me explain, typing the info that will take few minutes..
There are few capacitors, resistors and regulator chips mounted on power supply board. A failing capacitor or devalued resistor or failing regulator chip/ IC can cause insufficient voltage supply to activates the protection circuitry on power supply board to avoid any further damage, protection circuitry switch Off that section for example backlight inverter section or 12V supply line etc.
Sound output from TV is another evidence that shows main processor board is keep working but backlight system switches Off after some time when detects any error so screen goes dark but rest of TV stays On so you keep getting sound output from TV internal speakers.
These are the reasons that my diagnosis is based on. I hope these info will help. If you have any additional questions, feel free to ask.
You're welcome. If you're satisfied, please rate me a 5-star at the top of your page. Thank you.