Question about HP PL4260N 42 in. Plasma HDTV

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Just lost picture, still have audio. How do I know if it is the y sus board or thr y buffer board?

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Check if FS2 is open on the Ysus, if open then the Ysus board has a short circuit between VS and ground due to a defective IC18. IC18 is the hybrid under the heatsink.
Let me know if you require further info.

Posted on Nov 12, 2010

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Could be power board. Check for swollen capacitors . If ok next check buffer boards for burnt ic. With set unplugged unplug power board from sustain boards. Plug back in and see if it turns on. Unplug again and disconnect buffer boards from sus board plug power supply back into sus to see if it powers on. If it does then buffer boards bad. Isolate upper and lower to Determine which one is bad. Just always remember to disconnect power board from sus boards when disconnecting panel to buffers. Power supply stores a lot of energy and will burn these connectors while reconnecting them.

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http://www.forums.hcsd.com.au/Blah.pl?v-print/m-1175589480/

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