HP 9100A No Display - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: General Forum (/forum-4.html) +--- Thread: HP 9100A No Display (/thread-9023.html) |
HP 9100A No Display - aj04062 - 09-09-2017 07:33 PM Seeking technical help, parts, guidance, you name it to try and resurrect a 9100A model. Previous owner claimed everything worked except the core memory board. This was determined through board swapping with his other machine. I'm now handicapped to diagnose as I don't have this reference. A few months ago, I checked the power supply to the Service Manual available on HPmuseum.net and everything looked fine as I recall. I've also cleaned the edge contacts and double checked their seating on the main boards but didn't do the sideboards as Tony D calls them. I do need to check the clock, flip-flops and mains sync signal per Tony's comments on thread Since this early, simple testing, I commissioned some extension boards to fit into the dual slots. This will allow me to raise the core memory board above the others to probe. Thing is, I don't know what I'm probing for! RE: HP 9100A No Display - DanM - 09-10-2017 02:13 AM I am in Southern Vermont and Boston Area, with a 9100B... if this is close enough to you to be useful, let me know. Dan M. RE: HP 9100A No Display - aj04062 - 12-16-2017 02:06 AM BUMP Hi Dan, Sadly the electronics are too different to be of help. BTW, I will be in San Francisco over the NEW YEARS. If anyone in the bay area has a machine, I could bring some of the boards if they are willing to let me swap mine in to confirm the failed board. Thanks! |