Sony kd-85x85j LED blinking red 6 times

[EazyBone]

Might be for another tv.. but probably similar trouble shooting. Just compare best you can and report back.

[NolesFan]

I havent been able to do the testing as of yet. I had to put the tv and components back together because I was needing to have a dog stay with me and I didnt want to chance it with him . Since the backlights were working while open, after putting it together ( back still open ), I though meh why not and I turned it on. Woohoo it was working. I was watching sports in another room so I was back and forth for about 45 minutes slowing working thru the whole set up process. I was adding my network information, when all of a sudden, I heard a couple repeated fast clicks and the TV went back to 6 blinks. I know I still have to do the testing, but seeing the picture, is that a good sign that it has nothing to do with the LED panel itself and its just a matter of figuring which board the issue is on?

[EazyBone]

That does not mean it's not the panel. I have had a good number of Sony's that turned on and worked for a short period and then would die

Not to burst your bubble lol, but when it's turned on look for a small line on the screen anywhere or see if any defects occur. Go to YouTube and type "screen test" and play it, see if you have any defects with the lights or lines. Hopefully it'll stay on long enough to do that

[NolesFan]

Shoot ok...

Well its back to not turning on and giving the 6 blinks, but when it was on yesterday, I didnt notice anything weird on the screen, it was a nice perfect picture during the set up process and even when it went thru the sony set up and showed vibrant pictures.

I did happen to find the service manual for this model tv and a few others. It gives pretty good info about test points and shows with diagrams exactly where to be testing. I know my bubble has burst Ill keep my fingers crossed it turns out to be a faulty PB and do the tests tonight.

Would you know what is meant by G board ( see photo )?

[nomoresonys]

A is mainboard, G is powerboard.

[lotas]

Designation board...

[nomoresonys]

Mainboards are typically called by a few names: https://www.youtube.com/watch?v=Aodz2LHkzbY

[NolesFan]

Got a question.. In the first photo, you can see its telling me to test for voltage at JL1703 on BM5A, ok no problem right? Well in the second photo, it shows location of JL1703.. Its on the underside of the MB, how am I to get a probe on it? I was always told to never test boards with full power unless they are screwed down in place. Is that wrong? Can I remove the MB and put clamps on it to ground it from board to frame?

[lotas]

Doesn't this contact go to the connector?

[NolesFan]

Doesn't this contact go to the connector?

Lotas, sorry, Im new to this. When you asked the above question, do you mean does the br_err go to the point on the MB that im testing?

[NolesFan]

I also noticed something and Im not sure if this is normal. I was testing the stand by voltage and it read 3.44, but after awhile I didnt get a reading. What I found was as soon as I turned on the powerstrip to supply the TV with power, the standby voltage jumped to 3.44 and after about 2.20 seconds the voltage dropped to nill. Turn TV on, the standby power comes back 3.44 and then as soon as the relay trips to protect, the standby drops off again. I then waited 10 minutes to test again and now I cant recreate the just described issue

[NolesFan]

Ok, so I went and walked the dog leaving the powerstrip off. Flipped it on, and I was able to recreate the same 3.44 at standby for 2:20 and then it would shut off. I dont know if this means anything, just info.

[Storyteller12]

It's most likely the backlights. I know it was working but these Sonys are very finicky with leds.
I had one with 6 blink code and when I opened it all leds worked.

but after putting it into test mode where it test the led zones I finally found 1 bad led that didn't light up during that test but worked during normal operation and with led tester. I wired in a temporary led to test and got same problem (6blinks) until I replaced it with a Sony replacement led it worked perfect.

note these Sony leds are 12v not 3v or 6v like all the other TVs. I've never seen another manufacturer use this type of led either. Only Sony.

[NolesFan]

Ok sorry, like I say, still learning. I was counting the pins wrong on the harness. The stand by power was a steady 3.48. Please forget comments 31 & 32, my apologies.

[Diah]

I also noticed something and Im not sure if this is normal. I was testing the stand by voltage and it read 3.44, but after awhile I didnt get a reading. What I found was as soon as I turned on the powerstrip to supply the TV with power, the standby voltage jumped to 3.44 and after about 2.20 seconds the voltage dropped to nill. Turn TV on, the standby power comes back 3.44 and then as soon as the relay trips to protect, the standby drops off again. I then waited 10 minutes to test again and now I cant recreate the just described issue

i dont think you are messing the STBY rail.. because this should be always active.. but you are now messing PS_ON which the MB send it when TV working and turn it off when TV out caused by error

[NolesFan]

i dont think you are messing the STBY rail.. because this should be always active.. but you are now messing PS_ON which the MB send it when TV working and turn it off when TV out caused by error

Ok sorry, like I say, still learning. I was counting the pins wrong on the harness. The stand by power was a steady 3.48. Please forget comments 31 & 32, my apologies.

Yes sir, you are correct. After more probing and realizing my problem, I learned it was the PS_ON.

Last night I also tried the grounding of the BL_ERR but that didnt help.

I did find this video, which seems pretty thorough, I just hope I can comprehend what the terms are and locations of said spots are because he doesnt do much zoom.

Storyteller12 understand your post, because it makes sense, I just dont want to throw money at it "fixes itself" If I can at least get to the root of the problem, that will also help me in the learning process.

[NolesFan]

So I started with this today. First thing I did was test the LEDs at the harness, and once again only half lite. I played around with it checking other spots within the LED strip and they were testing fine again. Then once again the set that wasnt lighting, was lighting again. It got me searching for the video the above video was talking about, how he tested the LED strips and it gave it juice to work for a few days, then they would go out, he would test it again and it give juice and so on and so on. Thinking that maybe its possible the same thing was happening here with the set I am trying to fix. Because in the beginning I wasnt getting a lights then after testing I had lights, then the lights went out again. Only set I can available is out of China, so itll be several weeks for delivery.


https://www.youtube.com/shorts/XiqlYcLR_TU
https://www.youtube.com/shorts/R24fslC2Ees ( sorry for the music in the this video )

[Storyteller12]

I understand what your saying, but the YouTube video you showed from bigdogg ended up being the leds after all.

6 blink code is led error code and you can get the tv to start sometimes which indicates the power supply is good.

unless you have a shorted/ broken wire to the leds somewhere it's most likely the leds as I mention.

Do you have a led tester? Are these 12v leds like other Sonys I've had? If so measure each led not each strip and make sure each is getting 12v and not 10 or 9v etc. sometimes the light will work with 9v but still throws error because it's not 12v light it should be.

[NolesFan]

I understand what your saying, but the YouTube video you showed from bigdogg ended up being the leds after all.

6 blink code is led error code and you can get the tv to start sometimes which indicates the power supply is good.

unless you have a shorted/ broken wire to the leds somewhere it's most likely the leds as I mention.

Do you have a led tester? Are these 12v leds like other Sonys I've had? If so measure each led not each strip and make sure each is getting 12v and not 10 or 9v etc. sometimes the light will work with 9v but still throws error because it's not 12v light it should be.

Yes, I followed his follow up video and saw that. And since he was having same initial result, with the LEDs lighting under tester but failing under TV power, I think I am going to order a set. Its not a bad idea to have a set on hand anyway since at some point the LEDs will go out haha.

Not sure if they are 12v. Ive tested every individual one and they all read same 2.4 off a tester. I know they are not very bright with the tester. When I had them working, they got quite bright.

Also, I noticed if I hold the tester on an individual LED it blinks dim to bright and repeats. The whole strips dont do it though.

[NolesFan]

This is the markings on it