listmailgoeshere at gmail.com wrote: something similar to an assembly-level repair for the HP-85 may be found at: http://www.series80.org/PDFs/HP85-RepairCourse.pdf This is guide designed to teach repair technicians how to service the HP-85A and HP-85B Personal Computers. For the HP-86 you can find the assembly-level repair manual at: http://www2.akso.de/files/series_80/Assembly_Level_Service_86B.pdf but I think the quality of the scan leaves much to be desired. Also you can find Tony's schematics for the 86B at: http://hpmuseum.net/document.php?hwfile=719 Best Regards **vp