Mcintosh Volume control acting erratic

Have you tried unplugging the unit and resetting the pre-amp? Since it has a micro-processor in the volume control,it may have had some brain flatulence and just needs a re-bbot. If that doesn't do it call Chuck Hinton at Mcintosh if anything they will fix it under warranty.
I have had many Mcintosh pre-amps and have bfound the re-boot to fix any quirks. When it didn't Chuck helped me out.
Good people, great equipment.

Depending on how many compnents you want to program into a remote I have the marantz RC1400 and love it. I had the RC2000mkII and that was good but not enough memory. But I run my whole system 9 componnents with this little remote and a couple of macros. I like the ability to punch through other component functions to each component screen.

I don't think the modem is the culprit here. Mcintech has the best advice.