Sony XBR75X850C

[bstewara]

Hello,

I am currently trying to repair a Sony Model XBR75X850C.
The set has the dreaded 6 blinking error lights flashing. The set tries to startup with the screen illuminating but shuts down immediately
I have replaced the main board but no change.

So voltages from the G4 board are within range except one anomaly.
I keep getting a 1.9 voltage reading from pin out location CN 6402 pin 4 BL_ERR. I don’t see where I should be getting any voltage reading from this pin?
Anyone have any suggestions/recommendations?

TIA

[diif]

Re: Sony XBR75X850C

The LED flashing 6 times is a back-light error I believe.

[bstewara]

Re: Sony XBR75X850C

You are correct on the error code.
I’m just wondering if I don’t have an issue with the ps board as well.

Thank You

[diif]

Re: Sony XBR75X850C

It's possible, it could also be the LED driver board.

[bstewara]

Re: Sony XBR75X850C

I found a flow chart and it points to the LD or the G board.
Thanks again

[tibimakai]

Re: Sony XBR75X850C

Anybody knows, what is a 4 blink code could be? It is for a 65X900C

[nomoresonys]

Re: Sony XBR75X850C

Anybody knows, what is a 4 blink code could be? It is for a 65X900C

one here, also suggests doing a self diagnostic might clear up some issues.

Four blinks
- No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505

[diif]

Re: Sony XBR75X850C

Anybody knows, what is a 4 blink code could be? It is for a 65X900C

Panel or LD board.

[nomoresonys]

Re: Sony XBR75X850C

Possibly backlight led failure.

[budm]

Re: Sony XBR75X850C

https://www.youtube.com/watch?v=DyRdHSN43Y4

Bad LED is more likely. Do you have LED tester?

[bstewara]

Re: Sony XBR75X850C

4 red blinking error maybe LED driver or G board

[bstewara]

Re: Sony XBR75X850C

[Davi.p]

Re: Sony XBR75X850C

Tibimakai why did you entered here with your own different problems? Better to open your own thread..

[SLK001]

Re: Sony XBR75X850C

The six flash error code is a backlight issue. Most probably, it is a dead LED. I have the 65" version of this TV and all it took was a $0.05 LED to fix. But you really "earn" the fix, because you have to dig all the way to the heart of the set to fix it.

[bstewara]

Re: Sony XBR75X850C

You are exactly right.
It's a big job for such a small item to repair

[Marty-Club]

Re: Sony XBR75X850C

Hi i have the 65 inch version sony bravia with 6 blinking lights , back light error.....
can you give me some advice how to remove the pannel......

i have done a few Philips 42 inch.......

[SMDFlea]

Re: Sony XBR75X850C

Hi i have the 65 inch version sony bravia with 6 blinking lights , back light error.....
can you give me some advice how to remove the pannel......

i have done a few Philips 42 inch.......

Here`s the service manual for the xbr-55x850c, same type of chasis i think. The disassembly instructions start on page 12 .

[SLK001]

Re: Sony XBR75X850C

Hi i have the 65 inch version sony bravia with 6 blinking lights , back light error.....
can you give me some advice how to remove the pannel...

Do a forum search. This has been discussed in other threads. I started a thread on exactly this issue.