Question about Sharp Aquos LC-37G4U 37 in. HD-Ready LCD Television
Tried the solution by the guru but the tv now keeps turning itself off after just a couple of seconds and the blinking green light starts again.
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Posted on Jan 02, 2017
SOURCE: No picture, but power is on...
How many times does the POWER led blink per sec? (dont worry about the OPC)
2x = power supply (not as expensive to fix)
3x = Main board (expensive to fix)
Posted on Mar 14, 2008
The TV is on protect mode.
Try first leaving the TV power cord unplugged for some times, let say one hour or so.
Also ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem with no receiver box or dvd connected.
If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.
The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible reasons.
1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.
2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , startingthe flashing light.
If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.
If you are in situation 2 , then there is an internal fault.
Common faults that can occur are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.
Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.
If under warranty contact the manufacturer ringing the number on the user manual
If you want to repair at your own expenses, just locate any good qualified repairer.
Posted on May 22, 2009
I would try leaving the TV unplugged for 30 minutes to let the TV reset itself.
If that doesn't work, most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.
I hope I shed some light on the subject for you.
Posted on Jun 28, 2009
There is a procedure called and Industry INIT. The reason I cannot post it is that if it is done incorrectly it can wipe the memory of your television. Also if you get a yellow screen versus a red screen versus a green screen there are different steps to peform next. To attempt and Industry INIT you would call 800-237-4277 pressing 1 for each of the prompts. If the Industry INIT fails the representative will direct you to your local service provider. If you were interested in performing the repairs on your own partstore.com has parts.
Posted on May 10, 2010
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