Question about Sony KDS-R50XBR1 50" HDTV
A four flash error sometimes means one of the fans is bad or clogged so much it won't rotate. You probably will have to remove the back and visually see if the fans that are visible are rotating. There is also the main lamp fan that is located in the housing to the left as you take the back off. This fan is not easy to get to at all as it requires a bit of a tear down to get to.
Posted on Sep 16, 2010
The main fan in my R50XBR1 50" TV runs for about one minute -- after I shake it a few times -- and then quits. I have already replaced the lamp and the T1 board and even ordered a T3 board, I just ordered a replacement fan hoping that will fix the problem. If it does, I will return the lamp and the T3 board.
Posted on Apr 01, 2011
Possible that the main convergence board is having issues.
The power supply is working OK and tthe standby indicates that the microprocessor is also working.
So you migh need to take a first hand view to look into the set to confrim if there is any visible signs of damage, a leaked capacitor, a open power resistor, shorted semiconductor- power-, heating in IC's. these can be relative to the fault as a first hand infomation.
Posted on Sep 16, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
Five blinks - AKB
circuit (automatic kine bias), the timer/standby indicator blinks
for about 30 seconds then goes to the self-diagnosis function.
Something is wrong with the video. Check video out, Q705, 732, 761
and other components on the C board, also check Q218, 219, 220 on
the A board. In addition, unit could be in IK blanking, try turning
up screen A2 slightly.
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