Is the fuse still blown or does it still click when you turn it on/off?
These are the TV's that I repair the most and a FUSE DOES NOT BLOW FOR NOTHING. It's 6.3A not a 250mA fuse. The common problem in all Panasonic Tau sets from 32-36" (and some 27") is the degausser. While it may seem weird, remember the sound those heavyweights make when you start it? Some of those 36" even draw 10amps at start-up when the degausser comes on. You know that big, BOOONG....
What has to be done is either unplug the degausser and hope no magnet comes close or change the posistor (see pic) that controls the degausser strenght and how long it lasts. It's a small black rectangular box written some numbers on it near where the degausser plugs into the circuit. Tech needed for that.
One problem, is that the degausser circuit sometimes breaks the power supply in some cases. That may be your problem although you could have something else.
I'll say, if you are not a tech, change the fuse, unplug the degausser (here's a pic of what the degausser coils are :
In your TV, two wires come out from your huge degausser coils. (They are uselessly twice as large as the ones that were in my Mitsubishi 37'' and mine you could degauss manually...) Unplug the degausser and try again your TV. If nothing happens, well your supply is shot. A tech should be able to repair it for under 100$.