I replaced the screen panel on my Sony Bravia 52w4100 and not it won't stay on. When I powered it on it green lights for a couple seconds and the backlights come on but then it clicks and shuts off, turns back on again repeating the same thing in a sequence of three, then shuts off with red light blinking six times, pausing and repeating.
Sounds like a power board reset switch gone bad. Have the power board replaced.
Good Luck Ed Pinero
SOURCE: Sony Bravia kdl-46S3000 flashing red lights
Sounds Lamp is weak in this TV.
Please replace lamp and procedure is written in TV user manual.
SOURCE: Sony Bravia KDL 46", no picture, standby light blinks 4 times
Since the TV is still receiving power, the problem is going to be with the TV's mainboard. After you unplugged the TV and plugged it back in, you said the power light went out again, so I assume the standby light wasn't flashing again? The flashing standby light is indicating an error code so my suggestion is to contact Sony for service options regardless if there is a warranty or not because service is the only solution to this situation. Don't forget to provide them the error code or 4 flashes repeating.
SOURCE: my sony bravia tv is flashing red stand by light
Try leaving the TV unpugged for 30 minutes so the TV can reset itself.
If that doesn't work, most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you flashing red light codes, circuit diagrams, test points, and part# lists. Usually, cost under $20.
I hope I shed some light on the subject for you.
SOURCE: 40'' Sony Bravia goes into standby with the light blinking 9 times
I finally managed to solve this problem by unplugging everything - scarts - HDD cables - power etc and left it for an hour. When I turned it back on again the problem had sorted itself out.
SOURCE: My Sony Bravia Kdl40v300 will not turn on When I
sorry. Hope you still have a waranty. This is not an uncommon problem with the sony's. 99% chance that the panel went out. Could also be a balance board issue, but usually not. Call Sony for an authorized repair center
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