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The red blinks are a diagnostic tool. If you search this site for KDS-R50XBR1 you will see several problems and the area to look in to. the red blinks should be followed by a three second pause and then repeat. Just count the blinks after the pause and you should have a better idea of what is wrong. The service manual goes all the way up to ten blinks.
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.
I too have a Sony KDS-R60XBR1 tv and the issue that you are experiencing is due to one of your fans in the rear of the tv is not working. The tv automatically shuts off in protective mode. Make sure the POWER/STANDBY light is blinking and not the lamp light below it. Is the power/standby blinking 4 times in red? If, yes then its a fan that needs to be replaced. If its the lamp light blinking then you need to replace the lamp. The lamp is easy to replace by ordering the lamp either from Sony for $250 or find it cheaper for approx. $150 from other DLP sources and replace youself by following your manual. I hope this helps you.
If you are positive that the fan is still running and that it isn't an over heating issue, I would venture to say you need a new dlp lamp. Your model uses a Sony XL 5100 dlp lamp. You can grab one over at DLPLamps.com.