Five years ago I bought my first MPC 4k off Ebay. It arrived broken. I went through a process of trying to fix it, read everything I could but no fix. It was a huge ordeal to get my money back off the guy. The process lasted for 3 months. I never even got one second of sound from it.
But the 4k had always been in my mind so I thought I would go for it again. Bought one off Ebay about six months ago and the exact same thing happened. Never got a second of sound from the thing. I tried everything such as searching the web again and seeing the same posts I read five years before + trying all the usual suggestions. I went further this time and travelled 80 miles to see if a tech guy with some MPC experience could fix it. No luck there. This seller was a nice chap and gave me my money back. But I did my absolute best to get it working. I felt bad for him
Still determined I found one advertised in Sound On Sound a couple of months ago. Ebay was off the list for me for 4ks. I decided no matter where it was in the UK I was going to drive there my self. Luckily it was only a 300 mile round trip. When I got to the guys house it wasnt plugged in. I of course asked if he could plug it in. He did, and set about loading some sounds because I really didnt want any surprised this time. However, he couldn't get any sound out of it

I said I would take it but if anything is wrong I will be coming back with it. He agreed. He purchased it in 2003.
I get it home, plug it in, stick some sounds on a USB stick and within seconds I was playing some stuff off the pads. However, me being the unlucky btard I noticed one of the pads didnt trigger

But everything else was working and in general its in good condition. Although at the back the midi ports are scratched to hell. I dont know what the guy was doing. I mean, really scratched as if someone had sandpapered the area. All the buttons work great except the record and overdub buttons are a bit loose. I guess they will need to be replaced soonish? Paid £550 Uk which I was pretty happy about.
Just added an analog 8 out expander
I do worry about the mobos on this machine. Understand able considering my first two attempts to buy one.