My monthly switch on of my test gear released the 'smell of v......., no loss in the morning' the lovely smell of Rifa going to heaven. My gear is in stacks about 600mm high all on the same power board, the stack that started to smell was in the far corner (of course) and consisted of 2 boat anchors HP 54120 and 5371. The 54120 - worked, and was the first out, showing 'Schaffner-ing' but it was old - dried. Pulled apart and new bits ordered - the IEC filter is a 10A version.
The 5371 didn't switch on - when it was released from the corner - who needs to go to the gym!, it had fresh Schaffner extract and had blown the fuse, so more parts ordered.
The inside of the 5371 is a joy to behold, engraved instructional EMI shield covers, retained by knurled bolts - self restrained into threads built into the subframe. Man did HP know how to make gear!