Re: Sony KD-75XE9005 - all lights off
OK, the firmware update was tiresome but after a couple reboots it came up just fine.
I had to leave the WIFI module unpluged as it was short circuiting something on the mainboard. But I do not use the Smart TV functions anyway.
a $10 part causing a couple hundred $$ unneccessary self made repair.
I believe a professional service would have not figured this one out either...
At least that is what I tell myself ;-D
Thanks for your thoughts and support!
I will certainly be back with some issues...
amarzahn
New Member
Last Activity: 04-03-2022, 10:38 AM
Joined: 02-26-2022
Location: Freiburg
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Re: Sony KD-75XE9005 - all lights off
Update towards the NEW MAINBOARD:
flashed current software on mainboard.
Now backlight panel is lit but no information on LCD panel shows up.
No startscreen. Only after the time booting takes I get this weird Sony Service Sound (chill out music stream), nothing else.
The Sony Sound is also shown in a couple videos.
If I plug in the WIFI board the whole TV shuts down immediately with the "all black" symptoms from before.
I will try to order new flat ribbon cables even though it is weird...Leave a comment:
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Re: Sony KD-75XE9005 - all lights off
OK, i tried to go through the details.
I disassembled all and but it together on my desk then the mainboard would start (S/PDIF-Toslink lit and powerboard clicks).
So I figured something is shorting somewhere on the panel.
I plugged every device together piece by piece.
Only when I connect the
Sony Wifi board J20H088
the mainboard will stop starting and it all goes dark.
Which is completely weird because I can not see any power modulating features on this Wifi board......Last edited by amarzahn; 04-03-2022, 07:03 AM.Leave a comment:
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Re: Sony KD-75XE9005 - all lights off
The thing is, I have all boards in duplicate. The mainboard was freshly supplied by Sony itself. I will ask the supplier for advice. But it is hard for me to proof it is faulty.
Thanks for your support....Leave a comment:
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Re: Sony KD-75XE9005 - all lights off
That is easier said then done.
I ordered new boards because I lack the knowledge and time to go through the boards wiring.
I added the detail pictures.
220V appears fine. fuses are all good.
stand-by power output is supposed to be 3,3V.
I measure 3,5V when the mainboard is not connected.
After connection, the measured voltage drops to pretty much 0
I have no idea why that is.
I added the details in red on the two connected boards.
Thanks for your support....Leave a comment:
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Sony KD-75XE9005 - all lights off
It started all with random restarts or the TV being on in the morning and ended with a sudden fail. The stand-by light is dark since then.
Since then, means the replacement of both power boards
- APDP-293B1
- APDP-158A1
and the motherboard
BMKS 1-982-022-31
Still no use. So it is obvious I must have overlooked a single simple fail that probably would not cost as much as I already spent.
I believe the TV should start even though the back is open?
I was wondering if the TCON could be dead. But because everything is completely...Last edited by amarzahn; 03-14-2022, 10:57 AM. -
Re: New Members - please post your introductions here
Hey there,
I opened this account because I am currently troubleshooting my Sony KD-75XE9005.
I already read through some threads but I believe I missing someting very basic or my TV really has a very special problem.
Thanks for your support!Leave a comment:
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