Iomega zip 250 worked fine then one day it stopped reading 250 disks. reads 100 disks fine. I insert 250 disk and it spits it out within 2 seconds with no beeps. can I fix this myself. Went to Iomega and they say send it in. Would like to repair myself if possible. Have tried several different 250 disks and still spits them out. Thanks for any help.