Tek 310A sillyscope

Hi, I happened upon one of these beauts through one of those 'oh, you collect old computers, come back next week and I'll have something' type deals. This is a Tektronix 310A portable tube scope and just too well made to ever scrap, IMHO. For example it opens up like a car hood to give access to the entire centerline of the box, with components on both sides of the hinge. The reason Why I opened it is that it reliably blows fuses on power-on. All looks perfect, no burn marks or damage anywhere, just a little dust. My thinking is that its the old electrolytic capacitor thing. There are about 5 large (2"x3") and more smaller ones present. Do I just cut the leads and test-form them to see if they hold a charge or is there some other obvious thing to start with? I probably shouldn't ask before the holidays, but it might be worth a try. John A.