Sony kd-85x85j LED blinking red 6 times

[NolesFan]

I know the 6 blinks are a backlighting issue, but when I pulled off the back cover and turn it on, the is a white flash from with the panel then I hear what sounds like a relay trip and the TV goes into the 6 blinking light code. Before I pull all the electronics off and checking the individual strips, there is a on the power board, a harness with 4 wires that run thru the panel, which are what I believe are the LED lines, but Im not a tech so no clue. Wires read OUT 1 + & - and OUT 2 + & - My first inclination was to remove the power board and use my LED tester and go to each + & - wire and see if I get any lighting. But I also dont want to burn anything out, hence why Im back here. I cant really find info on this model on the NET. I dont know enough that when you get the 6 blinks, the only thing you can do is change out the strip or not. Thanks for any help.

[EazyBone]

Yes your thoughts are fine. Remove it and use the tester. The relay on and off is defitan indication of BLs bad.. so test them as you said

[NolesFan]

I tested, one set of wires, no lighting no movement on the meter. On the other set, got lighting and voltage change. EazyBone with your comment "The relay on and off is defitan indication of BLs bad", with a bad set of LED strips, its tripping the relay causing the 6 blinks, so change out the LED strips and ( fingers xed ) should be good to go?

[NolesFan]

Also, any clue on how to remove the bottom aluminum frame away from panel? I got the top and both sides, but dont think the bottom comes off the same way.

[EazyBone]

Each TV is different and each size is slightly different I haven't had this particular one. You should post pictures because we can't tell what it looks like. Sony generally uses screws though.

[nomoresonys]

Looks like you have two threads on the same tv, that's a nono. If you keep it in the same thread it saves from having to go over the same things that were already done or tried.

[NolesFan]

Eazy, I was able to get it off, it had screws but also little clips on the underside.

So after getting only one set ( seemingly ) to light last night, I took it completely apart to expose all the LED strips. I tested each strip individually and they ALL lite. I then tested the main connections again, and both sets of leads gave power to ALL the LEDs. In any of my testing with the LED tester ( this was my first time ) none of the LEDs got very bright. I dont know if thats normal or not?

So if ALL the LEDs seem to be working now that it had been taken apart, what would be the next logical step to look at, the power board?

[EazyBone]

Yes next logical is power board.. but when you originally did the whole line of LEDs at once you got a problem. So flip the chassis over again and try to light all of them up through that same connector and see what happens. Id still work on the lights if you had the error there in the first place. Recreate the error as I would of never recommended taking it apart if you didn't have that in the first place

[NolesFan]

Eazy, ok will work on tonight after work and let you know. Ill try to post a video or at least a photo of the LEDs brightness/dimness if thatll help also.

How bright should the LEDs get when using the tester? When individual strips tested on the + & - of the strip ( still all connected to all other strips with the wiring harness ), it read 10 and when using the harness, it was 173 on both leads ( meaning I have 2 reds and 2 blacks in the harness ). From watching videos though, the LEDs strip seem to get fairly bright compared to what I am personally seeing.

[EazyBone]

Each TV is different. When you have a lot of LEDs they generally aren't as bright. If they are all equally the same brightness I wouldn't worry. Sometimes led tester doesn't provide enough amperage.

If both lines were 173 I wouldn't of had you open it.. you said no lighting no movement

If they all good then you need to inspect the PSU. Take it off and look on the back it maybe something looks black around an area

[NolesFan]

Ok so I retested everything just to make sure I wasnt messing up yesterday ( worked a 13 hour shift ). The very first time I tested with the boards and everything intact, Im 99% sure that I had one side reading 173 and the other read 300 ( no lights meter never changed ). When I did the test initially, the PSU was still connected to the LED harness and I used the pins off the PSU side ( it was the only way possible to test the strips as the way Sony has the harness, it clicks in and out with the board install or removal ). Maybe I didnt have good contact, but I will say before I took the TV apart and the problem started, the only flash of light I saw on screen before the relay tripped to 6 blinks, was the lower half of the TV.

You can see from the photos, the results now. Both halves are reading 173. I looked over the board both front and back and there is nothing that jumps out at me. I even took photos of it to be able to zoom in to see a bit better, and I couldnt find any oddness.

I suppose at this point its a safe bet to put the screen back in since it seems I have working backlights, or do you feel I should off for the moment?

[EazyBone]

Unless it's absolutely necessary they need to put the screen back on or you need the space I would leave it off for the moment. How try and figure a way to recreate turning the TV on while your LEDs are exposed. I would see if you can disconnect the ribbon going to the t-con from the main board and maybe try and get the tv to power on without the screen on and see if your able to recreate it (if it's possible) I don't see all your boards or what you took apart .. but I would try and get it to turn on with the plug. Make sure you do not short anything out .. if you disconnect the correct parts it won't happen. Maybe it won't even turn on though sonys are tricky. Maybe someone knows how to do it here, I haven't tried with sony

[NolesFan]

Right now, nothing is on the casing of the TV other than the LEDs. I can try to get the PB and MB hooked back up.

[NolesFan]

Eazy, by the first photo, you can see what I reinstalled. Second photo is the TV acting as it should. LEDs went thru the start up process ( dimming up and down ) and have settled in. Currently have now been on for approximately 15 minutes.

[NolesFan]

So I left the TV on thru the night, about 11 hours and woke this morning and all the LEDs were still lit. Still have a few more pieces to attach ( TCON, wifi, and panel ) but Im hoping none of those send it back to error code. I dont think they should since none of those deal with the LEDs directly.

[EazyBone]

Bit of a mystery..

[lotas]

Sony kd-85x85j - 6 code error

[NolesFan]

lotas Thanks for the diagram, appreciate it.

[EazyBone]

Yea that's helpful. I was starting to think it could be panel

[NolesFan]

Now home, I can run some tests, but couple questions....

With the backlights lit up and no blinking code happening, wont the tests all come out correct?

The first step says Check BL_ERR CN3000 Pin #12 on my PB BL_ERR is CN6401 Pin #8. So am I to just find the names and be sure the tests read out correct?

Thank you