Re: Sony KDL-22BX200 no picture, backlight ok
I can't find a replacement for the psu at a decent price! Damn!
yoghi07
New Member
Last Activity: 05-10-2015, 05:42 PM
Joined: 04-29-2015
Location: Milan
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Re: Sony KDL-22BX200 no picture, backlight ok
Yes, 5V both sides.Leave a comment:
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Re: Sony KDL-22BX200 no picture, backlight ok
Checked, fuse is ok.Leave a comment:
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Re: Sony KDL-22BX200 no picture, backlight ok
I'm starting to think that the psu is the real issue here. I also checked every fuse on the mainboard and they're all ok!Leave a comment:
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Re: Sony KDL-22BX200 no picture, backlight ok
I also noticed that the optocoupler on the psu (white, 5th picture upper left corner) is a bit brownish. I tested the impedence on the diode side and it's the same if I measure both ways!
Could it be that? Just this optocoupler failing? I will get a new one this week, will update.Leave a comment:
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Re: Sony KDL-22BX200 no picture, backlight ok
Sadly, just an analog one. What voltages should I check in your opinion?Leave a comment:
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Re: Sony KDL-22BX200 no picture, backlight ok
I took some photos of the mb and the psu, for reference!
I was wondering if buying a new mb would help, I could currently get one for 30€...
Thanks for the help!
Edit: I also found out that a fuse on the psu (4th picture top right corner) has been short-circuited with copper wire. It was definitely opened before!...Last edited by yoghi07; 05-03-2015, 11:39 AM.Leave a comment:
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Sony KDL-22BX200 no picture, backlight ok
Hi guys I'm giving a try at repairing a sony bravia lcd tv, which doesn't work.
When you plug it in, the backlight flashes briefly and stays on, but no picture shows up.
The led indicator should turn orange and then green when you press the power button, but instead it stays red.
Another issue is that you hear a buzzing noise coming from the back of the tv.
I opened it up and it seems like someone has already replaced the transformer inverter and MAYBE the main transformer (I'm not sure about that) on the psu.
What could the problem be? I'm thinking... -
Re: New Members - please post your introductions here
Hi guys I'm an EE student from Italy who is struggling with a lcd repair job, I thought maybe you guys could help me!Leave a comment:
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