Re: Open Question on SPARC Server 670MP
From: The One4Sun - GWS (one4sun_at_lios.apana.org.au)
Date: 10/19/03
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Date: Sun, 19 Oct 2003 19:46:15 +0000 (UTC)
"Boris Grishneko" <borris@nospam.lisp.com.au> writes:
>I own a SPARC Server 670MP, which doesn't seem to be working. I placed a
>graphics card out of my SPARC Station 20 into it, and attached a keyboard. I
>then booted the system up, it beeps, and flashes the lights on the keyboard
>once. However nothing comes up on the display. What could be causing this?
If you get nothing happening beyond the keyboard initialising itself after
power is turned on, try using using the diagnostic LED's to follow the
sequence of power-on self tests (ie. POST) and get a handle on what's going
wrong. If you can, it also helps to connect a serial terminal to serial port
A to view diagnostic messages (assuming the power-on self-tests can run).
With a terminal connected, you can optionally change the 'diag/norm' switch
so it's set to 'diag' mode - this will cause extended self-tests to be run
instead of just the normal set of tests.
The following URL in my Sun System Handbook archive is the home page to the
Sun SS600MP Handbook:
http://www.sunshack.org/data/sh/2.1/infoserver.central/data/syshbk/Systems/SS600MP/SS600MP.html
The page with information about interpreting the POST LED codes is:
If the self-tests don't complete properly, you'll need to look at what's
causing the machine to get stuck on a particular test. It might be RAM, or
something else, that's being found to be defective and the tests will stop
when a fault is found.
If the power-on self-tests run to completion, the system board in the
machine might be configured to use the serial port as the console by
default, which would permanently ignore the presence of an Sbus framebuffer
card. Connect up a serial terminal, or something running a terminal emulator,
to serial port A and power up the machine. Leave the 'diag/norm' switch in
'diag' mode again
If you end up at the OBP level, either with an 'ok' prompt, or the machine
trying to boot from a disk or from the network, and nothing happens after
that, it's a safe bet that the NVRAM is configured to force the console
device onto the serial port. Use the 'printenv' command to check the
settings.
The two important ones are 'output-device' and 'input-device'. If they are
*not* set to 'screen' and 'keyboard' respectively, then the defaults have
been changed. If both give settings of 'ttya' then you need to change the
settings to the defaults since that will be permanently forcing the machine
to use serial port A.
You can issue the 'set-defaults' command if you don't need to worry about
any special configuration settings for booting, etc. and that will restore
the NVRAM to 'factory' settings (which includes setting 'input-device' and
'output-device' correctly).
Hopefully this helps you work out what's wrong. If testing using OBP
firmware doesn't give any results, try doing things like moving the
framebuffer into a different Sbus slot, and do all the usual things for
physically checking system integrity such as checking that the system board
and other boards are all properly seated on the VME backplane, and that the
RAM modules are all sitting in the sockets properly. Anything socketed needs
checking, even EPROM's (the SS600 board has four EPROM's containing the OBP
firmware). Try moving the system board around between slots, and try it with
different combo's of other boards installed. If none of these things help
figure out what's wrong, it could be a fault with the system board itself
(at PCB level) like a dry solder joint, or even a faulty VME backplane.
Hopefully you won't have to get this far though since extensive analysis can
take quite a while...
Ask us if you need any more help. I'm sure there are quite a few more people
in these newsgroups with SS600 fault-finding experience.
Regards,
Craig.
--
Guru Will Sellit! ** 'sunrk' on Ebay ** | Get Back on Track at the Sun Shack
Craig Dewick - aka the one4sun! | www.sunshack.org or www.sunshack.net
Main info website at www.one4sun.org +-------------------------------------
SRK's Ebay Shop is now available at www.ebayshops.com.au/sunripenedkernels
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