My huge mutha of a CRT Sony appears to have bitten the big one. Despite a few "reset" attempts, I just can't get a picture. Strange thing is, the Stereo A/B indicator LEDs on the front of the set appear to be trying to talk to me. They are flashing in a repeated pattern. One of 2 patterns depending upon how I try to switch on the TV. Either; A once followed by B thirteen times or..... A once followed by B three times. Anybody any ideas ??