I just cracked it open and checked the DC voltages and ripple. Everything was well within spec. The inside also looks very clean!
I didn't notice the tag earlier but it appears to have been taken from a hospital environment. It was a bit of a pain to pull the chassis from the case. Of course, the only tiny dent on the top of case was putting enough pressure on the side rails to make it difficult for the chassis to slide out without resistance.
I'm guessing you might be right and maybe the caps needed to reform or something along those lines. At this point I had the scope running for hours. Left if unplugged for a few hours and had it running for a few more hours and everything seems to be ok.
I'll probably recap it in the near future as I plan for this to be my everyday scope w/ my 2232 for 'slower' stuff.
The 'green screen of death' had me a little worried but feel relieved that it's been stable since those initial issues. All functions I've tested so far have worked perfectly. I'll need to play around with the menu and measurements system a bit more but the few quick measurements I've made were good. I need to read about the menu/measurement section as it has more features than the 2245A which I've been using.
I appreciate all the responses. I'm sure I'll have more questions!
