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Watching T V and screen went black, Is it junk or is their a way to reset it ? Power light is on , but that is all. No sound.

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Sometime after powering up, the power light will blink a number of times and any pattern (like say 5 blinks pause 5 blinks etc) should be noted since these are 'fault codes'

Posted on Nov 26, 2014

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Most TVs these days are computer-controlled, and the computer stays on, even when the TV is "off" so it can receive commands from the remote. Sometimes the computer gets hung up, particularly if there was a short-term power failure (a drop of a few seconds).

The way to reset it is to unplug the TV for a few minutes. See if that helps.

Posted on Nov 26, 2014

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Posted on Jan 02, 2017

dgjtex
  • 405 Answers

SOURCE: screen went black while watching, no sound

Almost for certain your power supply board is bad, Can be repaired at the component level only if you have some electronics savy! Good Luck!

Posted on Dec 26, 2008

  • 1 Answer

SOURCE: power led blinks but no picture or sound

Had the same problem myself. Took some doing but I managed to find a service bulletin that I downloaded. The problem is with the siene module and all you need to do is unplug connector JP63A from the main board and your TV will work again.
Take the back off the TV (there are a lot of screws) and look on the left hand side of the main circuit board that is mounted in the center of the TV. You will see a small white connector that is labelled JP63A, simply unplug it. Plug the TV back in and let it reboot. That's it, should be able to watch immediately.

Posted on Mar 15, 2009

  • 187 Answers

SOURCE: Green light but no picture, no sound

Your mainboard is damaged, replace it and that will solve your issue.

Posted on Jun 06, 2009

ginko
  • 19396 Answers

SOURCE: Sanyo DP42746 - Screen went black and no sound. Power light on.

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 Jun 16, 2009

  • 534 Answers

SOURCE: Red light blinking three times in a row

Service manual says 3 flashing red leds = eeprom error (main digital / video pcb).
Suggest you start by implementation of Fujitsu Service Bulletin PDP 0068-01 Main Digital pcb see:-ttp://www.eserviceinfo.com/download.php?fileid=43450

Posted on Aug 21, 2009

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