Akai S1000 / S1100 samplers

hi!
this is my first post here, so hello everyone!
i've recently got a S1000. it has a third party scsi interface, which
is made by mutec, i think. the first time i wanted to use the
saampler, i didnt get my scsi zip drive to work, so i read all the
post here about scsi troubleshooting. i opened the sampler and i saw
that a diode (which does the same thing like the fuse on the original
akai board) on the scsi board was fried. i replaced it and the zip
drive worked fine for one day. when i turned on the sampler the other
day the scsi drive couldn't be recognized again. i checked the diodes
again with a multimeter, but everything seems to be fine. does anyone
have any idea what else the problem could be?

thank you very much!

posh bot