This is a stand-to for an incoming competition, one of our most expensive yet.
Later this week we're going to be offering the opportunity to Win £270 Rab Neutrino Pro military down jacket
Visit the thread at that link above and Watch it to be notified as soon as the competition goes live
I know this is a long shot (and you've already put it back together!), but did you spot anyhing that looks like a CLEAR CMOS jumper? You'd be surprised how many things have something of this ilk. Sometimes its just two spots on the PCB with a label.
Wireless burglar alarms, some microwave ovens and car engine management systems have them.
Or you could wait for the seller to get back, of course!