Jose joked:
...But is it possible to check A4000 mobo without opening the case? (gee... :-D )
;-) Actually, if the Zorro slots were empty, and all the back planes were removed, a strong flashlight and good eyes might be enough to notice a few details such as the number of memory SIMMs on board, or whether the buster chip was soldered diectly to the board instead of being socketed, and like that.
:-D Of course, you'd have to be familiar with the A4000 motherboard's layout already...