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LG 55LH40 has Sound but No Picture    
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kg5ie51



Joined: 31 Jul 2012
Posts: 2
Location: TX

PostPosted: Tue Jul 31, 2012 3:06 pm    Post subject: LG 55LH40 has Sound but No Picture Reply with quote

I have an LG 55LH40 that has died. The unit has sound but no picture. I removed the back and found that 2 of the 14 wires that connect the VIT71881.00 Master 1 and the VIT71881.01 Master 2 inverter boards were blackened and burned. The connectors themselves are also slightly melted.

I assume one or both of these boards must be bad though I have no way to test them. I looked for parts and found that I can buy the Master 1 or Master 2 boards separately, or I can buy a kit that includes the Master 1, Master 2, Slave 1, and Slave 2 boards.

Master boards are about $35 each. The kit of all 4 boards is $180.

My question is whether or not I should chance buying just the masters or should I assume that more than likely the issue took out the slaves too?

Thoughts?
Thanks in advance.


Last edited by kg5ie51 on Tue Jul 31, 2012 6:22 pm; edited 1 time in total
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JTS1957



Joined: 21 Jan 2009
Posts: 2340
Location: Far, Far Away

PostPosted: Tue Jul 31, 2012 3:57 pm    Post subject: Reply with quote

kg5ie51 wrote:
The unit has picture but no sound.


Inverter boards would be involved ONLY IF you have this backwards.
kg5ie51



Joined: 31 Jul 2012
Posts: 2
Location: TX

PostPosted: Tue Jul 31, 2012 6:21 pm    Post subject: Reply with quote

JTS1957 wrote:
kg5ie51 wrote:
The unit has picture but no sound.


Inverter boards would be involved ONLY IF you have this backwards.



Whoops! You are correct. Got it correct in title and backwards in posting. Have sound but no picture.
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