This is usally a cause of capacitors that have lost their electrolytics. You can either replace them by desoldering them out yourself or replace the power supply board known as the smps. It stands for switch mode power supply. More than likely, you can find one rather cheap on ebay. This board has deadly voltages that can kill you. Make sure the set is unplugged for at least a few hours to allow the capacitors to fully discharge. If you are going to try to replace the caps, look for bulges in them. When a set does what yours is doing it's usally easy to find the defective filtering capacitors.
Regards,
Joe Van Buren
SOURCE: Picture and Sound flash from 'on' to a black screen
Hi, The problem lies within the unit. You have a hardware failure within the board. The power supply board needs to be repaired or replaced. If you are a handy person, you can easily swap the power supply board.. If not, bring it you to local reapir shop, they will find the parts and replace it for you. I wish I had a better solution like an easy fix for you. Sorry, but on hardware failure, there is no easy fix. Thanks, Mike
SOURCE: Panasonic TH-42PD50U RED ON LIGHT BLINKS BUT WON'T STAY ON
Normally, when this happens, the TV goes into " Protection Mode " because of a failing circuit board. Most likely the TV has a power supply related problem. It's possible that it maybe a bad capacitor or transformer on the power supply board.
The most common thing to go out on flat panel TVs is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board. But, I can't say it's 100% the problem because I can't actually look at the tv over the internet. I can only make guesses with the symptoms.
You have a few choices:
1. You can try leaving the TV unplugged for 30 minutes so the TV can reset itself.
2. If you have some electronic experience, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you red light blinking codes, circuit diagrams, test points, and part# lists. Usually, cost under $20. And most cases the new part cost less than $15.
3. Pay a TV shop to do the repairs. It maybe costly, but get an estimate of how much they will charge. That way you can decide if it worth repairing or replacing the whole TV.
I hope I shed some light on the subject for you.
SOURCE: I have a 32
The Power Supply has failed. The power supply may be repairable by a qualified technician or a new power supply may be needed.
SOURCE: My Panasonic tv displays only a thin blue horizontal line
This is vertical problem. The tv have a cold solder in vertical ic or ic is bad.
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