Sony bravia standby light is blinking 3 times then pauses and continues

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: 14 blinking red lights (standby) sony lcd

14 times means the LCD panel is defective. I just had one of those tvs in my shop. Sony will take care of the panel replacement in warranty.

SOURCE: 13 red standby flashing lights -- turns on, then turns off

Are you sure about the 13 flashes. Error code only goes to 8 flashes.

SOURCE: Sony Bravia KDL-40V3000 standby light blinking

I just worked on this last week 13 blinks means there is a problem with the backlights.So it can be 1 of 2 things bad inverter board( which costs less than $200) or the panel in which case you can thow the TV away as it will probably cost as much for a new TV.Unfortunately the set I worked on ended up being panel. If you try the inverter board just take your time removing it its plugged in rather tight I gently tapped it out with a screwdriver to get it started.

Rustym62
The TV Dude

SOURCE: standby light blinks 13 times

Hi,
13 blinks is backlight error.. can be 1 of 2 things, 1st bad inverter board (on left side panel looking from back) it has several plug ins to the panel as it supplies voltage to the backlights.2nd could be panel itself as backlights are built into it they can't be replaced. Inverter is probably around $200 +labor, panel= buy new tv... they are outrageously expensive. Good luck!