NutmegCT
Experienced Member
Dave: "Before you plug in the fixed power harness, you will now have to do some testing to see if there are lurking issues like shorts to pin 4 from who knows where. Old computers can be a series of complications."
Interesting that pin 4 on the board is a "dummy" pin - not connected to anything (except that strange harness plug I have). On the underside of the board, I see the circuit completely ignores that pin; etched lines go to the 3 pins on either side, but not to pin 4 - which appears as a "rivet head" on the underside of the board.
Lance - congrats on your new Osborne site. I never expected this thread to go on so long, but have to admit the information shared by forum members is certainly priceless.
Tez - I certainly hear you on "cranky with age". And that certainly applies to me as well as to my Osborne.
Lorne - yes, it might help if you could email or post a picture of the power harness connection to your Model 1 system board. Unless it looks exactly like the one you've already posted from your Model 1a.
As there were many "system improvements" from the very first version of the Osborne 1, who could ever tell why my system has that strange harness modification. Yet that's the harness that powered the computer when I first bought it several weeks ago, when it seemed to be working fine. Then I got it home and found the ram chip problem.
Cranky is perhaps a kind term for part of the aging process!
Tom
Interesting that pin 4 on the board is a "dummy" pin - not connected to anything (except that strange harness plug I have). On the underside of the board, I see the circuit completely ignores that pin; etched lines go to the 3 pins on either side, but not to pin 4 - which appears as a "rivet head" on the underside of the board.
Lance - congrats on your new Osborne site. I never expected this thread to go on so long, but have to admit the information shared by forum members is certainly priceless.
Tez - I certainly hear you on "cranky with age". And that certainly applies to me as well as to my Osborne.
Lorne - yes, it might help if you could email or post a picture of the power harness connection to your Model 1 system board. Unless it looks exactly like the one you've already posted from your Model 1a.
As there were many "system improvements" from the very first version of the Osborne 1, who could ever tell why my system has that strange harness modification. Yet that's the harness that powered the computer when I first bought it several weeks ago, when it seemed to be working fine. Then I got it home and found the ram chip problem.
Cranky is perhaps a kind term for part of the aging process!
Tom