my mates old pace 4001 went tits up so i swapped it tonight for a working one i had, took it round, plugged it in, and no picture. the box comes up on the front lcd pace, tune etc, but nothing comes up on the tv. tried both scart sockets and still nothing, tried it with the feed in and out. weird thing is is that it will let me into the engineer menu and change things, but as soon as i reboot the box i get a blank screen. brought the box home, did it on my tv aswell, but after it let me into the engineer menu for like a second, it booted me out, then the picture returned. tried pulling the red jumper but no change? and idea coz this has got me totally puzzled?