I have my original Zenith (ZDS) Z-150 computer, which was their answer to the IBM 8088/86 PC. This was also offered as a kit My Z-150 currently won't start up, with lights stopping in the BIOS PROM startup sequence. Does anyone have the equivalent Heathkit assembly manual(s) and drawings for this system? Or are there similar systems around that board swapping might be possible? What is somewhat unique about the Z-150 is that there is no motherboard as such (unlike all the PCs and Wintel systems), just an ISA bus and the CPU on its own board. A idea similar to mini- and bigger computers, but alas, except for the a few exceptions such as S-100 systems and the Apple-II, an approach that never caught on in the so-called "PC" series that have dominated since the mid-1980s.... Just curious. Thanks. Regards, Kevin Anderson * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Kevin L. Anderson Ph.D., Geography Department, Augustana College Rock Island, Illinois 61201-2296, USA phone: (309) 794-7325 e-mail: kla(a)helios.augustana.edu -or- gganderson(a)augustana.edu * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Opinions expressed here are my own and do not represent the administration of Augustana College.