bush 42" plasma tv?

i have a bush 42" plasma tv model pdp42tv004 i only can get sound no picture i have noticed since lost picture after turning on tv and taking it of standby you would here a click then tv would work proper since lost picture this click sound is no longer there this makes me think the reason i cannot get picture because of this if anyone has any ideas they would be greatly appreciated.

darren
December 2009