Always try power reset, unplug powercord for 5 mins then factory reset tv & update with usb drive from sony site- http://esupport.sony.com/US/perl/swu-download.pl?upd_id=7151
0 no red standby light-check powercord or bad main logic board or power board, check standby volts
1 red blink not used
2 red flashes is bad power board, solution replace power board
3 red flashes is bad main logic or power board, check for standby volts if ok replace main logic board
4 red blinks- can be LD board or main logic board, check inverter board wires for arcing to ground
5 red flashes- bad lcd panel connection or internal lcd short- squeeze bezel to locate bad connection
6 red flashes- backlight issue, bad main board, or power board or inverter boards- check standby volts on power board. "backlight on" volts should be 3-5v from main logic board then 24v to inverter
7 red flashes- main board over heating, can be short on power board or main logic board
8 red flashes- main board sp prot, try power reset, update with usb, or replace main logic board
9 blinks- check fan error, * if TV has fans
10 blinks- digital board or tuner board * some Sony TVs may not have this board
11 red flashes- bad main board, bad IC, replace main logic board
12 red light flashes is tcon error bad T-con board or bad LCD panel, replace tcon board usually
13 red flashing is backlight balance error bad lcd panel or inverter boards (common) or bal board on kdl-52v4100 only, replace inverter board usually then main logic board
14 red flashes HFR- bad TCON or Bad LCD panel, replace tcon board. unplug tcon board if tv stays on without tcon board replace tcon board.
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