Question about Sony KDS-R50XBR1 50" HDTV

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TV will not power on 4 red blinks

We have had several problems with our KDS-R50XRV1 and I am looking for some new advice. We purchased the TV in Dec of '05 and did not have any problems until last month. The TV would turn on for a brief second and then turn off then the light would go to red and blink 4 times. We read all of the posts on the optical block and so we called and had it replaced. At the same time we also purchased a new bulb but found that the yellow problem went away and the TV powered on fine so we did not change the bulb.

The next day it had the same 4 red blinking lights. We read some other posts about the fans. We took the back cover off and used canned air and cleaned out the fans. Again the TV worked for a day or two and then back to the red lights (4).

We have since made sure that it was connected directly to the wall outlet and also changed the bulb that we purchased when we had the optical block replaced. It will turn on some times and then others it will turn on for a second then off with the 4 red blinks. Once it gets in this state we have to either unplug it for a while or remove the lamp and put it back in.

I am getting so frustrated. I cannot believe that a TV that was so expensive is such a hunk of junk. Any other ideas?

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  • WillHolder Mar 16, 2008

    I have a Sony Grand Wega Model KDS-R50XBR1, purchased in Dec 2005. I've also had the optical block replaced and a lamp. My tv started doing the same thing. I took the back cover off and cleaned everything up manually spinned the fans. Turned the tv on and it worked fine for "45 minutes" now its back to the 4 flashing red lights. I believe the tv is overheating? I noticed there is more than one fan also? Does anyone have any advice for this problem?????



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Disregard "Guests" comments, he had a light blinking 3 times, which is a lamp/lamp door issue...

Chances are the large fan on the rear needs to be replaced.

Posted on Oct 01, 2008

  • FIXRUPPR Oct 01, 2008

    This is a fan issue, most likely the large fan in the rear, lower left (from the back)...

    Here's the fix, I promise, it's EASY........

    Ok, I think I have the answer for the BIG FAN failure. I recently did a
    similar fix on the spindle of an xbox 360 and it is identical. Ok, this

    Open the back of the tv, locate the large fan (on the lower left on the back of the set.) unscrew the screen and remove the fan.

    Once the fan is removed, you will see the side with the model number and the other side is totally open.

    On the open side, pull...

    The fan will come off, into your hand, it is only held by magnets...

    You will notice a spindle on the fan and the other side has the magnets
    and the hole where the spindle came from (this is the fan motor).

    Clean both the spindle and the hole (motor) with a q-tip. The hole is
    smaller than the q-tip, but do the best you can to remove the old

    Get a bit of WD40 and lubricate the spindle and spray a touch in the hole.

    Put them together, reconnect your fan, test it on startup and thank




I have the same problem with this tv. the only solution was pounding repeatedly to the right of the power button. There is a sensor underneath this spot and it is indicating that this panel is open. After 2 years of radomly having this problem, I opened up the panel and rigged the button, and I have not had the problem since

Posted on Mar 20, 2008

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I found the following suggestion on and it worked perfectly (going through the lamp door).


Quote: Originally Posted by Civicsixxx After some digging around I found that four blinks means there's a problem with a fan. I took the back cover off, used a screw driver to manually spin the fan near the lamp a few revolutions, plugged it back in and it powered right up! I guess it was just stuck or something. I'm a longtime lurker not much of a poster, but this happened to me to yesterday. I used civicsixxx's advice and this works. However you don't have to take anything apart. All I did was take out the lamp then put your hand in carefully to the right and you'l feel the fan just give it a spin and plug back in the light and the TV your good to go. Hope this helps.

Posted on Jan 03, 2008

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I know this isn't what you want to hear, but the problem you've described can't be fixed with troubleshooting. Your TV will have to be repaired. There is a part that has developed a defect and needs to be replaced. The 4 red blinks is similar to an error code. It represents what's wrong with the TV to a service tech who knows how to repair it. If you're still in warranty, the TV will be repaired at no charge to you. The warranty would likely be at least one year from the date of purchase from the manufacturer. If you purchased an extended service plan they will repair the TV at no charge as well.

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I hope I've provided you useful assistance and that this information allows you to make an informed decision as to how to proceed from here. Please be sure to vote on my response. I hope I've earned a good rating from you today.

Please let me know if I can be of further assistance.

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