Can anyone answer my philips 42" plasma fault?

Two faults, 1st, a black virtical line about 1 inch wide at the right hand side of the screen has developed with a thread of pixel colour. There all the time. Tried unplugging everything and still the same so it's not signal input.
2nd problem only just started, when tv has been on for 20 mins it switches itself off, green LED light still on so power is going to tv. When unplugged from mains for 5 mins I switch back on and it works fine for a few minutes again and then it switches itself off again. Any body with answers would be very appreciated!