SkyCaptain
Experienced Member
Hello good people of the Vintage Computer Forums
I finally have the crown jewel for my personal collection, a PET 2001 with blue frame, complete with chiclet keyboard and tape drive. And only minimal yellowing on the keys.
Its sadly not working... yet, but with all your help i managed to get two PETs working again, and this one seems less far gone than the others, but i dont know.
When i turn on the machine, i get a black screen. When I switch it OFF and ON again, i quickly see the screen filled with random characters but then it goes blank. The symbols are nice and crisp although not fully centred. So far so "good".
Before further diagnostics, i installed the Tynemouth Softwares PET ROM/RAM replacement board, and ran the PET Tester on it. It showed all RAM as "G"ood and the other screen with all the character set looked also ok. Although it was fuzzy, i checked with my other PETs and there, the character screen was also fuzzy. I cant entirely remember but it just looks like that.
I went on to switch it to BASIC 4 and 32k RAM and turned the machine ON again. And again I was presented with a black screen.
also for clarification, because i kinda dread working on and around the CRT screen... this is one of those PETs that has a video controller/board, right? I think i need a whole new set of schematics for this machine... does anyone have a layout map/schematic of the board? i only found one of the video board at zimmers. (I have that for the newer 2001 boards... i kinda need a layout otherwise i cant transfer anything i read on the schematics over to the actual board..)
anyways, pictures will follow when cleaned up!
Thank you all for any insight!
I finally have the crown jewel for my personal collection, a PET 2001 with blue frame, complete with chiclet keyboard and tape drive. And only minimal yellowing on the keys.
Its sadly not working... yet, but with all your help i managed to get two PETs working again, and this one seems less far gone than the others, but i dont know.
When i turn on the machine, i get a black screen. When I switch it OFF and ON again, i quickly see the screen filled with random characters but then it goes blank. The symbols are nice and crisp although not fully centred. So far so "good".
Before further diagnostics, i installed the Tynemouth Softwares PET ROM/RAM replacement board, and ran the PET Tester on it. It showed all RAM as "G"ood and the other screen with all the character set looked also ok. Although it was fuzzy, i checked with my other PETs and there, the character screen was also fuzzy. I cant entirely remember but it just looks like that.
I went on to switch it to BASIC 4 and 32k RAM and turned the machine ON again. And again I was presented with a black screen.
also for clarification, because i kinda dread working on and around the CRT screen... this is one of those PETs that has a video controller/board, right? I think i need a whole new set of schematics for this machine... does anyone have a layout map/schematic of the board? i only found one of the video board at zimmers. (I have that for the newer 2001 boards... i kinda need a layout otherwise i cant transfer anything i read on the schematics over to the actual board..)
anyways, pictures will follow when cleaned up!
Thank you all for any insight!