I posted a forum topic yesterday but I have a non-related question so I figured I'd make a new post.. I just bought a MK2 arcade in a deticated cab. I notice that there is a slight buzz coming out of the speakers. Not loud enough to notice while playing the game (even on a very low volume setting) but I can hear it once I turn the machine on (after that loud "Ding" sound). It originally had the ground prong missing from the power cable so I put on a new 3 prong end and it didnt fix the issue. I was wondering if there might be a problem or an electronic component in need of replacing or cleaning, or if it's just the normal sound these machines make. Maybe the speakers are picking up a 60-cycle hum from the monitor? It's just something I'm curious about. If It is fixable I'll probably get it fixed but I wont be in a huge hurry to do so.