MFM1%LEHIGH.BITNET@ibm1.cc.lehigh.edu (mark masters) (02/07/89)
The chip that is probably bad is a 74HCT157 or 74LS157. It should be located close to the port inputs. The chip is soldered to the mother-board, so if you want to get some one to desolder it for you I wouldn't think that would be to expensive. The chip costs about $00.19 good luck Mark