Howdy! Recently I purchased a broken MKS-20 in the hopes of fixing it. When I bought it the description said “powers on but doesn’t output sound” which was accurate. The description also went on to explain how all of the plastic spacers for the effects board were snapped and someone attempted to remedy this with glue.
Once I got it, I opened it up to figure out where to start. I found some new plastic spacers on Amazon that ended up being the perfect fit, so I installed them. In my initial test, there was absolutely no output whatsoever, however the screen (including the backlight!) and menus work as they should. I went ahead and rebuilt the volume slider and bypassed the relay since the relay is a know issue on these. After doing all that, there’s still no instruments. However if I adjust the volume slider up and press a key on my MiDI controller, I hear what sounds like faint white noise in the background (thru the headphones and other outputs) which lasts for a second or two after the key is no longer pressed and then stops.
So here’s a recap of what I’ve done so far:
Replaced the spacers for the effects board
Disassembled, cleaned, and rebuilt the volume slider
Removed and bypassed the relay
Checked all the fuses with a multimeter
Re-seated all the connectors
Checked the battery (I think it was replaced because it’s measuring 3.3v)
Inspected the boards for cracks or breaks (they look perfect to me)
Any and all help would be appreciated! Thanks!