Question about Proscan 42LA45H 42 in. LCD TV

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TV switches off immediately upon being switched on. TV purchased just a little over one year ago, not used until Nov 2009 and very rarely to date--DirectTV . Model 32LB30Q UM No: RN0332H0310

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Please leave your set ON for several hours and see if the circuit stabilises.It is possible that some capacitor has weaked with electrolytics drying up resulting in loss of value.
If there is no result then open set and try to look for components visibily faulty like high value filter capacitors. replace if suspected.
Use a good soldering iron to touch up soldering the main board, specially the mP sections, the display drives.
Plug/replug in all connectors after checking in the main board/powersupply/display section.
Use a multimeter to check the failed voltage and trace logically the cut off line voltage.
I hope you work on this tip.

Posted on Aug 25, 2010

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