The Color RAM as well as an inverter IC were bad. Found it thanks to a self made Dead Test Cartridge.
A little bit of Christmas fun (I'm not home). This radio was quite the trip. The usual bad filter capacitor of course. But someone also put in an ECC86 in place of an ECC85 for the RF amplifier section. The 86 is a battery powered tube, can tolerate at most 30V. The 85 here runs at 180V.
Bun's Lab
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…
476€ Lmao. Wish I knew what those resellers are smoking. You can't even give those scopes away