Need help with 921, screen goes black except for a very thin line at the top and you have to hold down power button for ten sec. to re start every morning when I turn on the TV. Seems to be locking up more often too. Is this thing on its last leg? I am still having a hard time giving it back to dish for a 622 due to the 1000.00 I had to pay for it 6/2004 and paying 200.