Path: utzoo!mnetor!uunet!husc6!hao!ames!ucbcad!ucbvax!RADC-TOPS20.ARPA!GUBBINS From: GUBBINS@RADC-TOPS20.ARPA (Gern) Newsgroups: comp.sys.zenith.z100 Subject: Re: floppy controller prob Message-ID: <12357407757.13.GUBBINS@RADC-TOPS20.ARPA> Date: 10 Dec 87 18:28:12 GMT References: <8712101853.AA06460@ll-vlsi.arpa> Sender: daemon@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 16 Hmmm. I have had even worst problems than that at one time testing controllers and damaging drives which damaged my good controller, etc... Start from scratch and see if your 'was-good' controller had any of the pots on the upper left moved (breaking the gliptal orange seal). Then push around and reseat all the ICs. Check the transistors and other components for lead breaks (This may happen during rough removal and hitting cables). If this all fails, I'd say you took a static damage hit (This is the season). It probably is one of the 3 Western Digital Chips (50% chance), try trading them with your friends controller. The Floppy Controller is repairable if you have a known good chip set and some time. I've done it, and the victim had 2 bad ICs... Cheers, Gern -------