Sony KDL-50W815B 3 blinks...

[PowerAmpFreak]

This Sony KDL-50W815B starts up and shows picture for a few seconds, then suddenly goes to errormode with 3 blinks.
It has external DC-powersupply.
Any advice?

[dick_barton]

Re: Sony KDL-50W815B 3 blinks...

Have you checked that the incoming DC supply voltage is not dropping. Power packs do become faulty.

[Andrew F. Ali]

Re: Sony KDL-50W815B 3 blinks...

Test the external PSU with another reasonably sized load and see if the power sustains or you could us another same sized PSU to test the TV. What is the Output Vdc??...It should be written on the PSU's label....I gestimate about 24Vdc.

[vinceroger69]

Re: Sony KDL-50W815B 3 blinks...

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. "como sony tv reparación"

[PowerAmpFreak]

Re: Sony KDL-50W815B 3 blinks...

Thanks for all kind replies.
Suddenly it started to blink 8 times... Seems like a faulty mainboard

Wonder if it's worth it to try update FW by USB ?