Since my 861v4 is way out of warranty, I decided to replace the PSU myself with a compatable one. The cost to go through the dealer (which was really just sending it to Meridian) was going to be ~ $1000 all told. This is the second time the PSU has needed to be replaced in my unit (over ~ 10 years).

I ended up ordering this psu: XP Power ECM40UT31.

I had to so some soldering, and the PSU was not the same physical size, so it's only held in with a single screw instead of four.

However, the unit now works perfectly and I don't notice *any* difference in sonics.

Total parts cost was < $75, and that included additional items like a cage, connectors, wires.