Question about Sony Grand WEGA KDF-42WE655 42" Rear Projection HDTV

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Problem with tv turning on and off

Tv turns on ,standby starts blinking, tv goes off ,standby blinks for several mins tv turns back on, goes off and so on,but lamp does not blink.sony said it could be the optical something but i cant remember what.can you help with this problem?

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  • modestet Nov 20, 2008

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  • 320 Answers

Does the green light begin to flash when the picture disappears? If so, you have a weak lamp causing your TV to shutdown the picture. Replace the lamp with an original Sony lamp as the aftermarket lamps are known to have problems such as early failure and low brightness. Please be sure to rate this solution. Thanks!

Posted on Nov 18, 2008

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Posted on Jan 02, 2017

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If the TV goes off completely, then is usually a faulty power board.

If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
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Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

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 , starting the flashing light.

If you are in situation one, then the TV 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.

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.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

Encompass Parts Distribution

LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |
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Jerry G.

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