Ah, time, the eternal enemy of all hobby projects
I finally got around to rearraning my bench and taking a closer look at the 'scope. I also took a couple of pictures, but most turned out not so good.
All in all, the device looks in very good shape, internally and externally. The only apparent damage that i found is that one of the back feet has been cracked. The lip pressing against the back panel is completly gone, and the hit was strong enough to even bend one of the screws. Also the retaining ring is dented directly beneath the foot, as if someone used exessive force when tightening the screws of the foot.
On the inside, everything looks very clean. I see no signs of dust at all. Many transistor and ic legs are quite tarnished though, so reseating them might be called for.
I also have some translucent deposits on some of the plastic headers. I assume it's the same stuff as in this thread:
https://www.eevblog.com/forum/repair/tektronix-485-what's-this-encrustation/In my 'scope it is not as prominent, it's more translucent.
The fuse seems to be the original proper one. It does not have traditional modern markings: One end has just 250 VOLT, the other BUSSAGC3, Google tells me that's a fast 3A Fuse, so the correct one.
I have uploaded the pictures to imgur:
https://imgur.com/a/O0Kb3Also thank you very much MaxFrister for pointing out the Troubleshoot your Oscilloscope document. That one is gold
I think i will try powering it up and i will follow that guide at first.
I will keep you all posted, this time hopefully with not such a big delay.
Greetings,
Ranayna