Could not find CS4231A (version=80)

Just started happening on my spare unit, and now it's pretty consistant. Some times it works, other times it fails. Oddly on my drive to and from work, it never booted properly until I got to my destination. Player hangs at "Loading audio..." now for obvious reasons.

So, what is involved in getting this repaired? This empeg also now has a bad rotary encoder, and considering it either assumes it's 1970 or 2038, a bad clock capacitor.