You either have a problem with your power supply board or main board. I would start with having the power supply fuse checked as well as the power supply board!
SOURCE: flashing red standby light
Take it down from its mount and try to restart it if this resolves the issue your mount is too tight on the back of the lcd monitor.. This happend to me as well good luck with your BRAVIA
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620
SOURCE: Tv will not turn on. Standby Light flashes twice.
UNPLUG AND TAKE OFF THE BACK AND CHECK THE FUSES,,MGT BE BLOWN,,
SOURCE: light flashing 13 times on sony bravia KDL-46x3100
It sounds like an Intergrated Circuit (IC) has fried. Even on a good day, this is not something you can attack at home. As a tech (and as an owner of that model samsung), I'd need a map & tools to know what's going on. Your best bet in this situation is to contact Samsung and let them recommend an authorized service center in your area. Sorry I can't be of more help, but this is a rather serious problem.
SOURCE: sony bravia kdl-52w3000, turn tv on, no picture or
Most likely this is caused by a defective main board. Changing the main board will fix the issue about 95% of the time.
To be absolutely sure, the voltages need to be checked on the power supply. If they are not the values listed in the service manual, then you should replace the power supply instead (accounts for the other 5% of the time).
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