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LG 50PN450B, first attempt :smoke, worth it trying again?

Troubleshooting TVs and Video Sources - Badcaps Forums - www.badcaps.net
Hello, its been a while since i havent been active in this forum, but now i am back in the business.

Here s the story:

A 2014 Lg 50" plasma recycling.

Disconnected the VS connector from the psu. The tv started without display, normally.

Inspected the zsus and found that 1 of 3 IGBTs at the SUS_UP was shorted.

Since i had no 30F133 available at the local stores i decided to give it a try with 2 transistors. No success, but then i find out that the 2 IGBTs of SUS_DN are shorted too. I fail to remember well if i measured them before or not.

Anyway i recover 2 identical IGBTs from another LG zsus and swap the 2 shorted. Measure everything, tight up all connectors, double check and ready for the test.

A visible arc goes between the chassis and the panel ribbon and the zsus goes popping soon after. IGBT of sus dn and up shorted again.

My question is, can this problem be panel related? I found a complete zsus for 40$ but im afraid to throw money into it.

Any opinions? thank you
Date: Oct 12, 2017   


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