Thanks for the suggestions. Interestingly, upon first boot I was able to get the hard disk controller error with the picture of the computer. Then, sure subsequent reboots failed to display anything.
I removed all the cards and booted with no luck. It looks like I will need to build a cable to try terminal mode. I did hook a vt220 with a 9to25 cablw, but didn't get anything. Since successful booting is intermittent, probably a heat or power problem. I will continue to try to get terminal mode working. Kurt On Feb 25, 2018 3:17 PM, "Mattis Lind" <mattisl...@gmail.com> wrote: > > > fredag 23 februari 2018 skrev Kurt Hamm via cctalk <cctalk@classiccmp.org > >: > >> Well, I bought that DEC Pro 350 on ebay. It initially booted up and I got >> the error screen. The error code I found on the Internet was related to >> the hard disk controller. So, I thought I just needed someone to >> sell/give >> me some systems disks for the unit and I could try to setup the drive >> again >> if it still functioned. >> >> Then, it after a couple of restarts (I re-seated the boards and cleaned >> the >> connectors) it stopped showing the error screen (with picture of the >> computer). All the diagnostic lights are red on the back and nothing ever >> shows on the screen. The power comes on and then nothing. > > > The tech manual is : http://bitsavers.informatik. > uni-stuttgart.de/pdf/dec/pdp11/pro3xx/EK-PC350-TM-001_ > Professional_300_Series_Technical_Manual_Dec82.pdf > > In case you haven't already found it. > > All LED on means sytem module failed. (Page 5-33). Have you checked power > supply voltages? I would try to remove all option boards and see if that > makes any difference. The printer port is actually a console port. The > details is in the manual (page 5-126 and 5-131). I suspect that all leds > come on if it fails to run the rom based diagnostic. It might have halted > to uODT in case you could try use the console to see if you could diagnose > the problem. > > > > >> If anyone has any thoughts, I would appreciate it. I knew the history of >> this type of computer and figured it was a long shot. I am just >> disappointed to have gotten really nowhere with it. >> >> Thanks! >> >> Kurt >> > > Good luck! > > /Mattis >
