Hello, I found this group while looking for information on an archaic computer system. I have several systems at home that may qualify as 'classic' computers... a Heathkit 6500 computer trainer (I think) with documentation SWTPC 6800 - in storage with a hefty 4k RAM Amiga 1000 Amiga 4000 ...and a few others. I am going home tonight to look at them and see if I might have something of interest for someone else. Intel (360?) Multi-Bus I system used for development... complete with software and manuals. I also have much documentation. I'm a packrat when it comes to User's Manuals. But it is now time to clean out the storage room. <sigh> I have information for those of you with Amiga 4000's for repairing your A3640 CPU boards. This is on my web site. Also - for replacing the capacitors in the Audio section. (This applies to any of the Amiga series. They used polarized caps in a uni-polar output stage of an op-amp.) Regards, James Jackson James Jackson Oztronics 1631 Escalon Ave., Suite B San Antonio, TX 78221-3126 210-921-1758 FX: 210-921-0124 http://joj.home.texas.net