*** Not sure. But back in day, it was common for electrolytic capacitors to give up after a while WHEN THEY WERE INSTALLED BACKWARDS. Electrolytics are polarity sensitive. They have
a plus end and a minus end. If somebody installs them backwards ( a common mistake ) they might work fine for a while, and suddenly give up. Violently. I've seen the little ones go *pop*, and the
innards spit out, just like confetti. The big ones... Let's just say you don't want to be near a big one when it pops.
Maybe you can get your vendor to email you a photo of that board from a good monitor?