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 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... -
I was using this TV for 5 years before it stopped working. I like this TV and would love to fix it myself.*
When I press the power button, the white led comes on (sony calls the module smart core) and then it switches over to 5 red blinks. No screen, no backlight, no relay click, nothing. I have disassembled the tv and found the service manual for 75x940e online. The manual suggests a faulty power board, TCON or the panel.**
The standby pin is at 3.3V. Fuses on the mainboard and TCON are fine. Caps on TCON also seem to be fine. When I turn on the tv the white led... -
Hey guys, got this Sony that turns on momentarily and then goes black with 4 blinks of the standby light. I can't find a service manual, but best guess was the Local Dimming board based on a similar TV saying LD_ERR or BCM_ERR. I found a replacement, but it didn't work. Before I put more money into replacement boards, Im wondering if anybody has seen this issue and what worked for them, or has the service manual for this specific TV.
Thanks!... -
I just got this today and it has the infamous 6 blink code. I've read it's quite possibly bad backlights, and I intend to check them soon. However, I was just curious if the Sony logo should it's shouldn't be appearing briefly between powering on and the light starts flashing. I've read at least one other person had the logo flash quickly, but mine does not show anything at all, not even a flicker. The green light comes on and after about 5 seconds the red light flashes. So I'd expect in this 5 seconds to see the logo. This leads me to believe it could be a power supply issue.
I...
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