HP9816

I've just bought a partially defective HP9816 (aka HP9000 model 216) on E-bay. Let me emphasise from the start that the seller declared the problems in the E-bay listing, so I am certainly not complaining. Anyway. one problem is that the power-on diagnostics mention an 'Alpha Video' failure, and then give a memory address/data failure message. I think the address is in the text video RAM area (it would be on a 9826 or 9836), so I suspect one of the 2K SRAM chips on the text PCB (the larger one standing up next to the CRT). I will do some more tests. Another problem is that I am missing a keycap, I think it's the left hand shift key. I have the small, compact keyboard. So a couple of questions. 1) Does anyone have a 'junker' keyboard that I could buy a keycap from. Or any ideas as to making one 2) Does anyone have the service manual (or is there a scanner version on the web, Google found nothing, and I couldn't find it on the usual sites [1]). Yes,. I know it'll be a boardswapper guide, but I might was well read it if it's available. [1]. What's up with http://www.hpmuseum.net? I get all sorts of 'SQL errors' when I look at the doucmentation index, and most of the manuals are no longer available :-( -tony