DEC H7260 PSU fault
jules.richardson99 at gmail.com
Sat Jan 27 17:38:52 CST 2018
On 01/27/2018 04:02 PM, Ethan Dicks wrote:
> On Sat, Jan 27, 2018 at 4:34 PM, Jules Richardson via cctalk
> <cctalk at classiccmp.org> wrote:
It seems that my DHV11 board is bad - the system stalls on the PSU tests
with it plugged in.
The TK50 drive sits there with a rapidly-flashing light (I saw someone
saying that's likely the tape feed band or just dirty heads, so it might be
The RD53 drive... hmm. I tried powering it without it plugged in, just to
see if it at least sounded healthy; it spun up to a "sensible-sounding"
speed for maybe 15 seconds, then spun down again. I tried again, and it
remained spun-up, but the initial spin-down was hardly encouraging.
With the drive actually hooked up to the controller, I'm getting "?54
RETRY" messages when it's trying to boot - however, I'm not entirely sure
what device it's trying to boot from! Maybe it's attempting the TK50, or
via Ethernet. I still need to read up on that and work out how to force it
to attempt a disk boot.
One other issue is that the RD53 was in the second bay (and hooked up to
the associated cables) - it makes me wonder if it was just an auxiliary
disk, and the system originally had another drive in the first bay
(containing actual OS) which has been removed.
> Just be sure to follow the grant chain
Yup, I *think* I've got my head around how that works! (along with the
special slots for CPU/RAM)
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