Fixed: PC CRT monitor. Highscreen MS-1770P, an OEM rebrand of a Viewsonic E70. Symptom: dead as a dodo, not even standby activity. Some resistors in the power supply gave out. First the SMPS controller IC was dead in the water. Tracing its voltage supply revealed R809 to be open. Fixing that brought it back to life with bursts of activity of T ~ .1s in which it tried to drive the power MOSFET. I figured it's not getting feedback. MOSFET tested fine, no voltage on the secondary of the transformer it was driving. Not enough on the feedback winding to make it through the rectifier diode. As if it was hanging in the air. Sure enough, R825 was open as well. Had to improvise a bit since I don't stock 330 milliOhm Power resistors. It's my own private unit and personally I don't care.

Fixed: Philips PM 3234 analog storage oscilloscope. There was the occasional jitter on the trace in the time axis, as if the trigger circuit was acting up. And sure enough, after reading the trigger section of the service manual and tweaking the right potentiometers, it works fine again. What a beauty this is. I gave it to a friend in exchange for something else that's pretty damn cool. More on that later.

Got: books!

Got them from a retired physicist who ran his own software company from the mainframe era of the 70s up until the early 2010s

Got: an oscilloscope card for IBM compatibles!
This thing is ancient, the specs are miserable and all it is, is this Analog Devices ADC with addressing logic and a few AD711 OP amps as a front end. But it's pretty damn cool.

This is what I got in exchange for the Philips scope.