Question about Sony KDS-R50XBR1 50" HDTV

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TV turns off anf on

My Sony tv is randomly shutting off and coming back on. It can go for several hours or it could be every two or three minutes. Sony really had no solution other than leaving it unplugged for a little or making sure it was plugged directly into an outlet. The lamp indicator trouble light on the front of the tv is not lit and the tv doesn't blink in red for the trouble codes when it shuts off. Any ideas?

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Re: TV turns off anf on

I have the same problem with a KDS-R50XBR1. The video and audio goes off, the power/standby indicator blinks green 52 times and then the picture and sound comes back, until it does it again. I haven't found any definitive technical info to help troubleshoot. Sony Customer Service was no help.

I replaced the lamp and the problem went away for several weeks, then it started back but only infrequently. It has increased somewhat in frequency over a few months. It acts like it might be related to a component in the lamp power circuit overheating and tripping a limit switch until it cools down and comes back on. I don't know if there is such a limit in the circuit, this is only based on the symptoms I observed. The older the lamp the more frequently it seems to happen.

Several times I've even had the video/audio go out and the red lamp indicator blink. After trying several different things (unplugging the TV, removing/replacing the lamp housing, cleaning the cooling fan, etc.), I've been able to get it to come back, but the cause was not clear to me. Once, when this happened, I tried putting the old lamp back in and it came back on but it triped off/on more frequently, just like it did with this lamp before I had replaced it. I then put the replacement lamp back in and it worked, it went back to the much longer trip cycle. I'm suspecting the lamp ballast/power supply block is causing the problem but I havent tried replacing it yet to confirm my suspicion. That is the next thing to try.

I don't trust that having a local service call would be successful without the tech replacing all of the parts that could possibility cause the problem. That would cost more than the TV is worth.

There have been an exceptional number of costly problems associated with this TV and, while the picture is very good and I like the TV when it is working properly, there comes a time when it doesn't make sense to continue throwing good money after bad. Sony customer service has been very poor too and, after my experience with this product, I'm rethinking my opinion about all Sony products.

Posted on Nov 29, 2009

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Re: TV turns off anf on

I finally got this problem fixed. I posted on another forum and found that when a bulb starts to go bad it can cause these TVs to do strange things. You can replace the bulb for less than half the cost of replacing the whole housing. See how here:

Posted on Feb 18, 2008

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Re: TV turns off anf on

Unplug-replug any/all connectors one at a time, including PCB edge connectors.

Posted on Sep 26, 2007

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