Ruben, "pad of death" is specific to Yashica Electros - it means the "pad" is dead (deteriorated, crumbled), and the camera doesn't work OK any more. The "pad" is a kind of cushion, bumper, as Bates said. Basically, it's a smal square piece (3x4 mm, 2mm thick) of rubber-like material, that in original Electros was made of a kind of foam, I guess, which crumbles and just turns to a sticky mess.
This is a frequent issue with Electros - so frequent that it got a name: "pad of death".
The solution is to replace this "pad" with something else, and glue this square piece in proper place, and it usually makes those Yashicas alive and well again. A sign of "pad of death" is when the exposures are incorrect. YOu can see it for yourself with a simple test: point such Yashica Electro towards a uniformly lit surface (white wall is OK), and make several shots (no film in the camera). For each shot, pick a successively slower f-stop - i.e. start with f1.7, and for each next "shot", close it by one stop - i.e. 1.7, 2, 2.8, 4, 5.6, 8, .... etc.
For each new "shot", the exposure (i.e. shutter sound) should be progressibely longer. You may not be able to discern the sound on 1/500, 1/250 and 1/125, but slower speeds - 1/60 to 1/8 or even 1 second, should be easy to hear.
If the shutter isn't getting slower for each smaller f-stop, it's probably the issue with the "pad of death" - the first suspect in malfunctioning Yashica Electro.
Hope this helps... Just learned all of this some time ago myself
BTW, I managed to fix mine just fine.