I'm getting this problem also. The box only boots if you force it and then only to AP:52. It's a 4001 and should set itself but it doesn't. The frequency is incorrect and the net id shows a row of dots. I made a funcard to set net id and I set the frequency correctly. The box reboots as it should but then stays on TUNE and I can't force update nor enter eng menu without a jumper pull. Any ideas?
strip the box out, and remove the tuner. pop the silver cover and look for the central pin solder onto the board. mine was a dry solder joint. spot of solder later...( and I replaced the washer ) perfect.. no more AP52.