25 Feb
2018
25 Feb
'18
2:39 p.m.
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" <mattislind at gmail.com> wrote:
fredag 23 februari 2018 skrev Kurt Hamm via cctalk <cctalk at 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