All,
I'm wondering if someone can confirm my diagnosis for a problem with my VAX 4000-300. One day, after it had been running for the better part of a week, I found it unresponsive with only the AC light glowing. I suspected an overheat problem, but the overtemp light wasn't on. Nonetheless, I shut the machine down, left it for a while and came back. It started up again, booted into VMS and seemed fine. I let it run for a half-hour or so, then shut it down normally. That was two days ago.
I just tried to power it up again to do some work, and the power-on tests fail about halfway through (but never in the same spot, so I don't think it's actually a power-on test failure). The machine goes to the same state each time: just the AC lamp glowing. I even have the fans on high (and that's noisy), but no go.
I figure it's time to replace the power supply unit (or refurbish it, but replacements are still relatively cheap). Any other thoughts? Thanks -- Ian
>-----Original Message-----
>From: Dave McGuire mcguire at neurotica.com
>Sent 10/7/2008 11:52:25 AM
>To: General Discussion: On-Topic Posts Only cctech at classiccmp.org
>Cc: General Discussion: On-Topic and Off-Topic Posts cctalk at classiccmp.org
>Subject: Re: some odds and ends to get rid of
>
>
> Recent devices? The 2500 platform is upwards of fifteen years old.
>
> -Dave
>
Plus, the next task would be finding an IOS for it with DECnet. Back then, Cisco was
raping and pillaging for IOS. Then ya gotta hope the flash+RAM in the 25xx is enough
for an IOS with DECnet, assuming you find someone with a Cisco support contract to
get you an IOS for it.
Tony
At 12:00 -0500 10/7/08, Joe wrote:
>hello all,
>I have an original Mac SE here, which seems to be giving me lots of
>trouble. so far im in a new mobo, CRT (I let the magic gas out of the
>original one, second SE ive done that to!) SCSI and floppy cables, and
>floppy drive. the weirdest thing happens to it, and right now, im
>looking at power supply failure as the next logical guess. my problem
>is, I try to boot up my mac from either internal or external floppy,
>but regardless of which it is, it will read the disk, and on restart
>the floppy disk will be corrupted and will need to be reimaged.
>second, no matter the hard drive I put in it, the mac either will not
>see it, or it will go through, initialize, then at the end a dialog
>box will flash really fast on and off, and the computer I/O will lock
>up while doing this. the other thing that makes me think it is PS
>failure is the fact that one time i hooked the hard drive in to power
>while it was running, and when I did so, the fan speed bogged down
>significantly on spin-up of the drive. is there anyone with pinouts of
>this PS i can use to test it, or any advice as to what failure points
>I should check first? I tried google (they say its our friend...) and
>I get no info as to the voltages of the logic board connector or the
>like. any help is most appreciated!! thanks
On my Plus, I had sporadic problems which ended up being due to the
connector between the analog (including power supply) and digital
boards. I took that loose, scrubbed pins lightly with very fine
sandpaper and isopropanol, sprayed on silicone oil (but I'd recommend
a contact cleaner instead), and re-seated both ends of the cable.
Resistance across the cable (measured from solder joint on the back
side of the analog board to solder joint on the back side of the
digital board) went down from 10's of Ohms to fractions of an Ohm,
and the system turned reliable.
The resistance measurement is a pretty easy one to make, with the
system off. I'd recommend that, at least.
--
- Mark 210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
technology adequate to stop them:
Think of it as Evolution in Fast-Forward.
I have a Cromemco ZPU I need to qualify. I also have a lot of Cromemco
Floppies. If I could get the ZPU Working then I might be able to set
up a Cromemco HD System. There is a lot of source on those floppies. I
posted them for making copies. I just was able to look at all of them using my
Compu-Pro 8-16 system booted up to CP/M 2.2. Is there anyone out there
still running CROMEMCO's. Got a bunch of CDOS Floppies as well [they
are also posted to make copies available]
There is a wealth of Stuff here that should be wasted. Need to get
them copied and saved somewhere. Job is to big for me right now.
Bob in Wisconsin
As part of my Downsizing efforts I am making available Copies of any of the following to interested parties. I can only handle Money Orders and Certified checks as I don't have a PAYPAL Account
CP/M 2.2 4FDG XEBEC BIOS
63K CP/M 2.2 Diagnostics 4FDC 4 8" Drives
4FDC BIOS 8-16-83
64K System Bios Unk bootable on a 16fdc
48K System boots on a 16FDC ITCCPM2.2
ITC 64K CP/M 2.2 A= 8MB HD B= 2MB HD C&D 8" floppies
ITC 64K CP/M 2.2 A B C = 8"
CP/M 2.2 no source boot fails
4FDC MP/M MASTER
CP/M 2.2 56K 16FDC/WD1
4FDC TUART Routine Cromtvar ,asm, .com
Intelligent Terminals Corporation Replacement disk
CP/M 2.25 for 4FDC 3 SA800 drives 63K
4FDC SA800 A&B sa400 C&D 63K CP/M 2.2
Cromemco Bios CRBIOS.z80
Cromemco System Diagnostics
I also have a ZPU and a 16K static RAM plus a 48K ByteSaver
Bob in Wisconsin
As Part of my Downsizing efforts I am offering the following items to
the BEST OFFER. I Can only handle Money Orders or certified Check as I can't acquire a PAYPAL acct.
I will make copies Available to any Interested Party but will not be selling the Originals at this Time.
CDOS 2.36 Drivers SSSD
CDOS 2.53 64K SSSD
CDOS 2.53 64K SSSD
CDOS 2.53 SSSD
CDOS 5.0 DSDDsystem disk 2 CCPM SSSD
System rebuild disk 1 SSSD
System rebuild disk 2 SSSD
I believe all of these to be for a CROMEMCO System
Some of them were readable on my NEC APC
and some I was able to read on the Compu-Pro 8-16
I just had a bout With Colon Cancer and am Downsizing my Computer Collection.
I have a N*Horizon with a Wooden Cover. I am going to stuff all the N*
Cards I have into it along with a Pair of SA400's and Offer it to the
Highest Bidder "AS IS"
Got a CPU, W/Prom Option[Untested] a MDS-AD3, 2-MDC-A4, MDS-A2, 2-RAM
32A1, 2-16K RAM, 2-HRAM6,
a SIO Rev3, HSIO [4 port serial]
Weighs about 65# not including Packing. Then I have some Manuals and a
box of 5 1/4 Floppies that I will have to send Separately
Make an Offer. I can Only deal with Money Orders or Certified Checks
Don't have a Credit Card so can't get PAYPAL
Bob in Wisconsin
Bout 15 Miles NW of Milwaukee right off Hwy 41-45 in Menomonee Falls
Above E-Mail is good
As part of my Downsizing Efforts I am offering the Following three 8" SSSD Floppies
SCP DISK 1 MS DOS v2.0
SCP DISK 2 MS DOS v2.0
SCP 86 DOS Cromemco Format
I will make copies available to interested parties.
Please contact me off-line to arrange Details
Bob in Wisconsin
I'm trying to get some loose ends tied up, and that involves
duplicating tape cassettes.
I have a TC-WE635 "Stereo Cassette Deck". It says "DC Servo
Controlled Motor" on the doors, so it must be good! : )
It has "Automatic Tape Selection", so I will have to trust that...
It gives me a selection of:
Dolby NR
(OFF) (ON) (ON FILTER) and then a (B) and (C)
Which settings do I want to use?
It has stereo audio outputs on the back, of course, so I will also
record the audio into a computer. However these days I don't want to
put all of my trust into the computer...
Grant
