This Sony KDL-55NX723 can work for minutes to days and suddenly give 4 blink code.
What can be wrong ?
What can be wrong ?
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Re: Sony KDL-55NX723 suddenly 4 blinks
Dry joint maybe
go over all joints on power boards
and on the led driver board where power is supplied from the psu boards.
Had a simialr issue on a 55ex720
did the above and has been good for last couple of months.
before was shuuting down daily flashing.
Its happens on some of there maybe you have issue. -
Re: Sony KDL-55NX723 suddenly 4 blinks
Could not find any dry joints. Solderwork seems good.Comment
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Re: Sony KDL-55NX723 suddenly 4 blinks
Try heat/cool boards. See if you can replicate the problem.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: Sony KDL-55NX723 suddenly 4 blinks
Probably defective led driver board. Any dark spots in the picture before it turns off with the Four blinks? I had a 55hx729 do the same thing to me and I replace the LED driver board in a problem was solved. BAd ic driver on that board it was cheaper for me to replace and repairDid I leave the soldering iron on?Comment
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Re: Sony KDL-55NX723 suddenly 4 blinks
No luck finding out the problem.
I want to measure the 'ERROR' signal on the led driver board in order to verify this is the problem first of all.
Anyone know where to monitor the error signal and what state it should have ?Comment
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Hi there,
I see a couple of posts related to the troubleshooting of similar TV. The one I have is acting slightly differently and I'd love your help.
So it has the 5 blinks. Previous owner got a TCON, no luck. Got a new Main board (though he didn't do the USB firmware update), again, no improvements.
I see 2 posts that are relevant:
https://www.badcaps.net/forum/troubl...j-oled-5-blink
https://www.badcaps.net/forum/troubl...g-hardware-dev... -
Hello,
I have problem with SONY 55X90J. After several check status is as below;
1. Running power board as stand alone:
TCON_12V =~ 12.6V
EVDD V On Max 24V= 19V.
2.Running power board with TCON as stand alone:
Effect as below, attched.
3. When bottom LVDS cable is disconnected no blinks, but of course no TCON 12V and EVDD.
"I'm almost sure it's a defective panel, but maybe someone has encountered a similar issue on their screen.
Best regards.... -
Hi everyone. First post on Badcaps!
I am trying to fix a Sony 940E from 2017 that either starts normally (and works perfectly until turned off) or goes straight to the 6 blinks error code without showing anything on the screen. It is frustrating to know that it can still work perfectly but is barely usable because of the difficulty starting it up. I am willing to try to short the BL_ERR but I would like to avoid that if possible. Does anyone have a view on this? Thanks a lot.... -
Hi everyone!
I have a Sony KD-65A1 TV with a fault – 4 red LED blinks. After disassembly and visual inspection, I found that the G76 power board and DKA board had been replaced. It is also possible that TCON was replaced, but I am not sure – there are a few marker marks that could be factory-made.
Based on assumptions, the previous service attempted to solve the issue by replacing potentially faulty components. I decided to investigate further, found a service manual, and figured out a way to power up the power supply unit autonomously and put the OLED panel and... -
Hi I'm new to trying to repair TVs, but I saw a broken OLED offered for a reasonable price and thought I'd try my hand at it.
I found the service manual, which was critical to know where to probe.
https://www.manualslib.com/manual/20...1e-Series.html
With it I was able to determine that my DKA board was bad, when P_ON#1/2 gets enabled REG_12 on the DKA board collapses. I'm assuming one of the downstream regulators has a short, but I couldn't work out which rail/component and replaced the DKA board entirely.
Unfortunately the 5-blinks...
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