I have a 50PC1DA have had it for a few years, it started failing to turn on from stand by, had to switch off at the wall and try again sometimes up to 5 times, then it started making a fairly loud cracking noise with the white light flashing before turning off and going back into standby, now it just wont come on properly, it initially comes on but after 3 seconds goes back off
Hello Junior,
This type of failures is commonly due to defective capacitors in the power supply.
Check the video from the link.. LG 50PC1DA Not powering up clicking sound no picture or sound Diagnosis
SOURCE: wont come out of standby
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SOURCE: loud cracking noise sounds like fireworks and wont get a picture
It seems you have loose or cold solder joint connection problem,causing a cracking sound.The solution is to reworks or resolder the solder joint connection in power supply section, audio section and inverter section...
Hope this may help you;
Regards,
VOTIT
SOURCE: tv turns it self off after only 2-3 seconds and makes crack noise
Since the set is less than 1 year old, it should still be under warranty. Request warranty service.
The noise you are hearing is probably arcing inside the set on the power supply board. Continuing to attempt to turn on the set will only make things worse. Please request warranty service as this is unusual for a TV that new.
Dan
SOURCE: 42 LG plasma no picture but sound. found internal
Sounds like it started "Protection Mode" because of a failed electronic part inside the TV. When this happens, the TV will keep turning itself OFF or will not turn ON at all. This keeps the other parts inside from being damaged. Most likely the TV has a power supply related problem.
The common part to go bad for flat panel screens circuit board that powers the screen itself. Most manufactures call it a Backlight Inverter Board.
But, I can't say what is 100% the problem because I can't actually look at the tv over the internet. I can only make guesses with the symptom.
You have a few choices:
1. Best thing to do, 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 circuit diagrams, schematics, test points, and part# lists.Usually, cost under $20. Its the best repair guide material for fixing TVs. And most cases the new part cost less than $15 by searching on the internet with the part number.
2. 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: My tv goes to turn on then the green light flashes
commonly it is the power supply of your lcd try to check the dc output
it is not giving enough power to operate your lcd.
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