Re: LG 60PB5600 - No picture
Well it seems I have exhausted the patience of this board. I guess at this point the TV is unrepairable. Does anyone need parts?
mtb604
Member
Last Activity: 10-28-2016, 10:58 PM
Joined: 06-30-2016
Location: Orange, CA
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Re: LG 60PB5600 - No picture
Is there any way to check the logic board?Leave a comment:
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Re: LG 60PB5600 - No picture
So is this still repairable or did I completely fry it this time?Leave a comment:
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Re: LG 60PB5600 - No picture
Hi Civilandave- check the youtube videos on ShopJimmy.com. I seem to remember that issue was addressed in one of their repair videos. If the problem turns out to be a bad y-sus board, I have not been able to find any replacement boards, but ShopJimmy has a repair kit to replace the transistors and resistors if you are comfortable soldering the components.Leave a comment:
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Re: LG 60PB5600 - No picture
Is it beyond repair now?Leave a comment:
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Re: LG 60PB5600 - No picture
Well, crap. I connected the y-sus board to the P130 connector and the P100 ribbon cable. There were pops and flashes in the vicinity of the IGBTs and smoke from the vicinity of the logic board.
After I disconnected the power and waited for the caps to discharge, I measured the resistance across VS and ground at the P130 connector and now I get 0 ohms.
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Re: LG 60PB5600 - No picture
No. The four IGBTs I replaced are all shorted so the TV will not stay on with the Y-Sus board connected.Leave a comment:
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Re: LG 60PB5600 - No picture
I got 9 K-ohms across VS and ground at the P130 connectorLeave a comment:
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Re: LG 60PB5600 - No picture
Thanks for sticking with me!
Here is the top of the Y-Sus board....Leave a comment:
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Re: LG 60PB5600 - No picture
Should I replace the buffers and then replace the IGBTs again?Leave a comment:
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Re: LG 60PB5600 - No picture
Might the buffers be shorting out the y-sus board?Leave a comment:
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Re: LG 60PB5600 - No picture
Is this a lost cause or should I keep trying to find the fault?
What do you recommend I try next?Leave a comment:
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Re: LG 60PB5600 - No picture
I tested them off board and on board- no short.
I installed the board and plugged in the TV and the IGBTs shorted immediately.
What did I miss?Leave a comment:
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Re: LG 60PB5600 - No picture
So should I just replace those four IGBTs and then reinstall the board and see if it works?Leave a comment:
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Re: LG 60PB5600 - No picture
After removal, all four of those IGBTs still appear to be shorted. Is it common for all of them to go at the same time?
Also- are there any other components I should check while I have the board out?Leave a comment:
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Re: LG 60PB5600 - No picture
Okay. I will remove them and test them off-board. Thanks to all for your help- IGBTs are very confusing to me.Leave a comment:
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Re: LG 60PB5600 - No picture
Across which pins?Leave a comment:
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Re: LG 60PB5600 - No picture
Out of curiosity - what indicates that they are shorted? I could never find a pinout for them.Leave a comment:
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Re: LG 60PB5600 - No picture
All of them?Leave a comment:
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Re: LG 60PB5600 - No picture
Or are all of them bad?Leave a comment:
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