looking for a working 11/05 (KD11-B) board setu

Even if it isnt, I fail to see what good a spare CPU board set will do. I know I am in aminority here, but I truely believe the only way to put something right is to find the fault, and then to correct that fualt. Not to randomly swap parts until the machine _appears_ to work again. In any case, I don't know anyone who would be prepared to risk any PCB in a machine where the health of the PSU isn't known. The first thing to do is to discover just what it is and isn't doing. If it were my machine I would start by checking the PSU with a meter and 'scope. PSU problems can make you think there's something wrong with just about any part of the machine. Then I would try reading and writing memory. If that fails. I'd stick in a DL11 or something and try reading and writing that (if that works, it's _likely_ there's a problem in the memroy section). And look at the Unibus lines when doing meoroy accesses from the panel -- do they look right? If not, there probably is a problem in the CPU -- then it's time to see which signal(s) are wrong, what drives them, could there be a common cause, check 'earlier' signals in the CPU logic, and so on. -tony