PANASONIC TH-42PV500B

[JAYROD]

Hi, anybody familiar with the panasonic TH-42PV500B.
The tv powers up with the screen very dimly illuminated but no pic or sound.
Now and again it will work normally and will continue to work if left on.
The fault does not appear to be temperature related. Red led flashes continuously when faulty.

Any help appreciated, cheers phil.