Normal ESR Values for Capacitors of Various Types
For ESR those are probably okay, of course in-circuit they may not read correctly but if you have  good ESR meter it's probably close enough. 

Anything that's connected to cables etc. is potentially at risk, and more so if it's CMOS (or very high frequency bipolar- which this stuff isn't), or older CMOS (which the 4051 is). You can replace both those chips inexpensively and put machined pin sockets in there while you're at it. 

What's that crud on the lower orange capacitor leads? Did it get wet? Looks like residue elsewhere on the board too.