My 2465, which I have avoided opening up because, well, it was working and recapping is a big project, is starting to make fan noise on a regular basis. So I shut it down and took it off my bench, replacing it with the 485 that was there before, is in excellent condition1 and which, is a fine scope for the stuff I do.
Given a choice between recapping a 24x5 PSU and repairing a noisy fan, I'd prefer to recap the PSU. I've recapped 2.5 times; the 0.5 is replacing only the delayed action smoke generators which had reached their delay time
.
There are many guides to recapping here and at tekscopes and other places. The gotcha with the electrolytics is that two are incorrectly shown, so the best tactic is to remove/replace only one at a time.
The standard gotchas with the fan is that the collet holding the fan onto the shaft is brittle and prone to self destructing. I've had them off many times without problem; the key technique is to turn the nut
not the screw (the screw head is used to stop the collet's shaft rotating when you turn the nut). Having said that, the last time I tried it, the blasted collet came out in 5 pieces. I'm awaiting a 3D printed collet. No, PLA homebrew isn't good enough - that self-destructs before insertion!
There are guides to renovating the Siemens motor on tekscopes; I'll wait until it is
really necessary before doing it.