Question about Sony Grand WEGA KDF-60XS955 60" Rear Projection HDTV

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Picture is really dark

Suspect the fan stopped working and put too much pressure on the lamp causing it dead also.

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I think nothing other than the lamp could be causing the problem, is the fan actually out or you just suspect it stops working. Is the lamp an original sony lamp? some outfits that supply the replacement lamps just go by the physical shape of the lamp(round or square?)it might be you got the wrong lamp for it.If the fan is not working then the heat of the lamp could cause some light engine damage, could be an expensive repair.

Posted on Sep 04, 2009

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HDLP61W151 has dark spot in screen


If it happened gradually I would suspect the lamp--a photo posted here might help.

The other possible cause in a Optical light engine which might be very expensive to replace in this brand.


Typical light engine:


12_17_2012_4_12_25_pm.jpg

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Why would the picture still be dark even after replacing the lamp?


Optical light engine is possible----Also this set if a "generic" bulb is used for a replacement can cause this problem.

If NO change in brightness after lamp replacement suspect either the ballast for the lamp or the engine is bad.

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I just replaced the lamp on my Samsung HLS5087 and now the TV won't power up. The 3 LEDs are lighting which indicates that the lamp needs to be replaced. I put the old lamp back in to make sure there is...


Hello,


Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.


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Powers on and off all the time like a thermal switch is tripping when I put a fan behind it it stops


It may be a safety thermistor component inside tripping as it overheats just as you suspect - working like an electrical fuse, but responds to heat instead. They can go faulty and start turning the power off too soon

Another possible cause is a dry solder joint (very common problem). It's ok while cool, but after a few minutes of being on, the heat in TV causes the tiny solder break to widen just enough to switch it off.


If you can leave it on with the fan blowing on it, and it does keep going on & off without you touching it, then i'd say it's 95% certainly a thermistor.

If it turns off, and you have to turn it back on manually (it goes onto standby or off completely), then it could be either, causing the problem.

Another final thing I see as possible is, the screens inverter can be heating up and going off (the TV will stay on really, but the screen will go black as if it's off, and when cooled even slightly it can turn back on again. You can check this easily by putting a bright lamp close up to the screen. The picture will still be there, but very very dark - a flat light gently touching against the screen will allow you to just about see the TV picture.

(the screen inverter is a special high powered circuit that takes a lower voltage (usually about 12 volts) and converts into a huge amount needed to work the powerful bulbs in TV screens.

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I have some dark shadow on the right side of the TV screen, I think it could be the lamp, is that true?


No,colors misalignment,shodows pictures and 3D pictures are not cause by the projection lamp.It cause by the tv convergence board have 2 STK convergence ICS and some or all it resistors are dead.The shop will cost u $300-350 for the parts and labors.

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A Blinking Lamp LED is the most common failure indication. It can be caused by a bad lamp, a bad Ballast, Color Wheel not operating, Fans not turning, or even other defective Boards. I would suspect the Ballast or fan first though.
Hope this helps,
Skyassoc

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