My tv is a 50in lg plasma. The power supply fuse ...

SOURCE: Just bought an LG plasma tv model 50pq30. can't

If you just bought it call where you bought it and tell them they need to send a repairman out to fix it.

SOURCE: LG 42PX4MVH PLASMA TV - Sound but no picture.

I have the same issue with my LG 42PC3DVA and I narrowed it down to the Y SUS board. After a little research there are a few items that are prone to go. The ceramic fuses (as you found), sometimes the capacitors on the Y SUS, Z SUS, and power supply go along with them You can tell because thy will be bulged at the top instead of flat. I replaced a few of my capacitors - they are only $0.89 each so it was MUCH cheaper than a board.

The other thing that is common on the Y SUS in particular are the FETs (also called MOSFET). They can be replaced if you are good with a soldering gun but they are static sensitive so be grounded. They are also a bit tricky to test so you may want to do some research on how to determine if this is the issue... or you can just replace the whole board.

SOURCE: im trying to hook up surround sounds on a 50in lg

Use the audio jacks in the Monitor Output section. See pages 9 and 19 of the manual:
http://www.hdtvsolutions.com/pdf/50PX5D-0314-50px4dman.pdf

SOURCE: how do i connect surround

your tv will have an 'audio out' you plug that into your surround sound system with rca cables.

SOURCE: where can i get replacement

I belive the screws you are speaking of are 5 mill 20 thred per , I have found them at local TV shop. They will give them to you if you ask. IF you can not find them local, e-mail me.
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