Games won't boot

Ok, I got a brand new laser a couple months ago cause my old one died, the pot setting is at the lowest it will go. The cog wheel is just about as high as it will go. My games will boot 1 out of 10 times. This just started happening today. I have been playing it for months now with no problems. What the heck is going on...? :banghead:

Well, i turned the cog wheel up a couple clicks and it works again. I dunno tho.. the lasers new, so I shouldn't be having this problem. Does this mean its gonna happen again in another few weeks? (this is really starting to bug me)