As an additional thought, the capacitors usually bulged after
"overuse"of the machine --
-- not that you used the machine too much, but rather the machine was always drawing power, more than should be reasonably expected. Even when it was "off" (like too many other electronics out there), it was still drawing electricity. To most of us, especially those of us who pay our own electric bills, that's not very reasonable.
The way you disabled this overuse was to put the machine in POWER SAVE mode. When you went to power it off, it would then totally cut off as soon as the fan ran the temperature back down to normal.
That brings up another point! HEAT!
The other most common way for the caps to bulge is if the machine were routinely used for extended period, such as 6+ hours in a row, and not allowed to cool down. While the JVC is very well cooled inside and out, it's still a fairly compact case design for a DVD recorder, and heat builds up! Those LSI Logic video encoder chipsets really get hot.
Be sure the machine is well vented, and not crammed inside some crummy compact consumer "entertainment center". Those units are just awful for heat, especially wooden ones where the units have no airflow or air circulation.
Some folks have even taken to custom modding their JVC DVD recorders, removing the cover and drilling some holes in it, in the top of the case. Beyond that even, some have installed large 120mm or 140mm fans that push air up through a custom vent. This type of fan adds almost zero noise, while supplying an enormous amount of hot air push-out.
Attached below are some images of what bulged capacitors look like, photos from my Panasonic ES10 before it was repaired about two years ago. (You must be logged in to view the images!)
ABOVE IMAGE: Notice the slight bulge and leaking of "capacitor juice".