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Aric
Aric, Technician
Category: TV
Satisfied Customers: 41983
Experience:  15+ years in the field. Owner of AV Installation, OEM and Repair company
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Sharp LCD Tv, picture goes out, power light keeps blinking

Resolved Question:

Sharp LCD Tv, picture goes out, power light keeps blinking
Submitted: 4 years ago.
Category: TV
Expert:  Aric replied 4 years ago.

How long have you had the set for, and when did the problem occur?

Was it after a storm or power outage?

Does the standby/timer light blink continuously, or in a pattern (such as 5 blinks, pause, 5 blinks, pause, etc.)?

Customer: replied 4 years ago.
The set is almost four years old. No power outage. It blinks continuously, once per second.
Expert:  Aric replied 4 years ago.

Please disconnect the set from AC power, then press and hold the power button on the TV itself (not the remote), for 10 seconds. After another minute, plug the set back in and press power once. Do you still have the same problem?

Customer: replied 4 years ago.
Still blinking
Expert:  Aric replied 4 years ago.

If the TV still does not power up, then the flashing light would indicate that there is a short inside the set stopping it from fully powering up.

It is most probable that there is a failure on the power supply board inside the TV. Commonly the capacitors on this board will receive a surge and then fail. They can sometimes be visually verified by removing the rear of the set and inspecting them for bulges or leaking fluid at the top or the base of the caps. This is the most common mode of failure for these sets.

The capacitors are located on the power board inside the set, where the AC cord plugs into and can be replaced by a Tech for no more than $200 parts and labor.

 

Unfortunately there is no sequence of buttons or reset you can perform to get the set working again. Do you have any experience testing live voltages, or soldering on electronic equipment?

If not, then I would suggest using the link below to locate a technician in your area:

http://www.tvrepairpros.com/

If you need further assistance, let me know.

Customer: replied 4 years ago.
How come sometimes it works?
Expert:  Aric replied 4 years ago.

This is common to the nature of what a capacitor is.The capacitors are similar to batteries, in that once they are charged, they can continue to run inedifinitely, but once they receive several surges, the resistance gets so low, that they act as a short, and can intermittently shut down or not power up consistantly. The solution is to have the capacitors replaced.

 

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