The sound on atara's computer cuts out, but only in very specific circumstances. Once it cuts out the only way she can restore it is by rebooting her machine - a soft reboot usually suffices.
Anyway, it cuts out when the cat jumps down from her desk. Not any cat, just Merry. Also it doesn't cut out every time Merry jumps down from her desk either, it only does it when she has the ceramic heater behind her running. Actually this is an improvement over last winter when having Merry run past her computer would, at various times, cause it to lose its sound, lock up, or spontaneously reboot.
Nothing else causes this to happen. We can walk, stomp or tip-toe past the computer all we want and it won't cut out. I can jostle and bump the machine and it won't cut out. We can drop things on the floor and it won't cut out.
But when Merry jumps down from the desk, and the heater is running, her sound cuts out until she reboots.
So my question is: what's going on and how do we fix it?
If it's any help, we replaced her video card between then and now.