Ended up tonight doing some parts-swapping. Took from the "leaking" IIfx the RAM, HDD, 3.5" drive and graphics card and put them to the better unit i got before. Now having 20Mb RAM (need to test for functionality), 200+Mb HDD, two 3.5" disk drives, Radius Lemans GT and Apple Macintosh II Display cards. At first for not remembering the Bank A-B thing, inserted the 4Mb RAM's to Bank B and got the not so lovey "chime of death" (specially when our daugher was sleeping in the next room) and made me thinking what did i do wrong 8-o Anyway, atleast found out that one RAM bank was broken, the small metal holders were missing but the RAM stick well there anyway. If that's the problem, i can always clean up the "leaked" motherboard and have one working unit, let's hope that's not needed.
More testing tomorrow.
More testing tomorrow.