LCD flat screen stays blank on power up. What's wrong with it?

I have a 42" LG LCD that's about 4 years old now. Every now and then, when I turn it on the screen stays completely blank. I can hear sound, but the screen never comes on. I'll turn it off and on a few times then eventually it will work normally.

It's had this problem for years but it seems to be getting more frequent. Any ideas what it could be?

?2010-12-26T15:27:47Z

Favorite Answer

Usually bad 3300uf caps in the power supply. If you replace them use 25 volt capacitors not 10 volt. If you give a model I can be more specific.

scarface882010-12-26T23:23:24Z

some function probably rusted out