i think your problem is some dry joints(bad solder joints),i have posted here before a good setup proceedure for monitors-basically you need to turn all your pots down(on the remote brightness and contrast,on the neck card all the drive and background pots and the screen volts on the lopti),then you start by turning the screen volts up untill you just make out a picture(use a mirror),then turn up your background colour to half way,then your contrast a little,then the brightness a little then your foreground(gains) colours untill you see depth in the colour,then its a case of fine tuning using all the pots-as for the problem with the pincushion you can adjust those pots on that upright board with it switched on-but first you must check for the bad solder joints,its very easy if you tap the chassis gently(tap the metal frame) and your picture jumps or is affected then you have a bad solder joint,these are usually very easy to see as you will notice cracks around componants-if i can help anymore then let me know,also i know a guy in the medway towns that maybe able to help but obviously this would cost