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

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Intermittant lamp cycling

I just replaced the 1468798-14 Lamp Driver with a 1468798-16. The TV comes on, and I get a picture for about 30 seconds and then the picture/lamp goes out while the green light blinks. Then the picture/lamp comes back for about 30 seconds. This goes on indefinitely. The lamp driver error warning happens intermittently as well. Bad lamp or something worse?

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Re: Intermittant lamp cycling

I think it was both.  I've replaced the lamp driver and the lamp.  TV works great!

Posted on Oct 13, 2007

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Re: Intermittant lamp cycling

Could be lamp or lamp driver the only way to tell is to replac on at a time.

Posted on Oct 13, 2007

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Most likely you have bulb failure. First step in troubleshooting is "Change the Lamp or Bulb". Lightning, power line bumps and collisions with vacuum cleaners can all shorten lamp life. Rough handling in shipment can also happen without your knowledge.

+90% of all Sony LCD Rear Projector "No Picture or Intermittent Picture" faults are related to bulb failure.

If new lamp does not improve the situation, then hands-on troubleshooting by someone that has parts and knows how the unit works is the only practical remedy.


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Since you have not replaced its lamp yet. Symptom shows that TV lamp is weak and consume more then required current and causing error of shut down and reboot.
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Sony Grand Wega KDF-60XS955 Picture comes on and then goes off.

You have a bad lamp. Sometimes when the lamp gets old, it doesn't fail and open like they usually do. Instead, the reflector gets cloudy, and instead of reflecting the light, it converts it into heat. As the lamp heats up, it draws more power, eventually to the point where the TV senses it drawing too much power and shuts down, going into a reset cycle. replace the lamp and use an original Sony lamp, as the aftermarket lamps are known trouble makers. Be sure to rate this solution. Thanks!

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We keep losing sound and picture on our TV

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No Picture/Sound

can you go to the error menu?
im assuming it's the lamp however the error menu will tell me more
If the standby light blinks five times repeatedly, that's indication of a "Lamp driver error". The probable cause listed is, "lamp driver faulty". Its also possible that the internal antenna used to detect the presence of high voltage has become mis-positioned. The lamp driver provides the high voltage. If no high voltage is detected, it is assumed that the lamp driver is faulty.
Otherwise, it is assumed that the lamp is bad and the LAMP LED lights
the part number for the lamp is XL2000U. Its available for $200 at Use the Part or Accessory Number to locate the part.

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