My cart mixer is a Mackie Onyx 1620, which has served me well for a couple of years. Recently, though, I've noticed that a "solo" button and a "mute" button (in two different strips) "stick". Also, there's a 1/4" port that has makes contact intermittently.
The mixer is otherwise in good condition and I have no reason to believe there's anything more serious than a lack of cleaning or lubrication. I called "Stretch" at Valley Sound Music Technologies (a Mackie authorized service center) and they pre-charge $75 to take it in, then there'll be somewhere between $150 and $200 for checking, cleaning and lubrication - assuming there's nothing wrong with it.
I wonder if there's anything else I can do on my own before I take it there (compressed air, contact cleaner…) and part with $300, seeing as it isn't worth more than $400.
Any pointers would be greatly appreciated,
BK