Some time ago I diagnosed my Minolta X300s with a dead capacitor (empty area after removing the cap. in the lower right corner; the picture is from SIC Feb 20).
Well, yesterday I finally received spare capacitors and attended to the repair. One of the two soldering spots (the one on the left) got corroded due to a leakage from the previous capacitor and wouldn't accept any soldering alloy. After 10+ trials I googled a simple(!) idea and followed the path on the circuit from this dead spot. Luckily there was another soldering spot before the circuit got more branched, thus one leg of the capacitor is soldered there. And it works!
Sigma 17-50/2.8 with no. 1 extension tube; F/22 as the lens has no aperture ring. It is a bit softy but I was almost touching the subject with the front element, so the DoF is almost non-existent.