Re: Ultra 1 won't start at all, sometimes

• From: dnichols@xxxxxxxxxxx (DoN. Nichols)
• Date: Wed, 01 Feb 2006 06:12:22 +0000

According to Hopla <hopla.tv@xxxxxxxxx>:
> Hello everyone,

	[ ... ]

> I have an old Ultra 1 Server on which I finally managed to install an

	[ ... ]

> Now, I finally got this far and the thing doesn't want to start anymore
> 
> some of the time. I hit the powerswitch at the back and *nothing*
> happens, absolutely nothing. Two hours later or a day even, I hit the
> switch et voilà, it starts making noise! Boots and everything.
> 
> I recon it has to do with the PSU, perhaps a fuse that doesn't fit
> properly anymore? I really can't tell, cause I not very good with
> electronics and the PSU is all covered up anyway.
> 
> Anyone who can help me out?

	Well ... it may depend on which version of the Ultra-1, but the
one which I have (140 MHz, IIRC) has a small fan mounted over the CPU
package, in the middle of a Plexiglass (or other acrylic) structure to
guide airflow to the various things which need cooling.

	Mine died, and the screen would display "Overtemperature --
shutting down" (or something similar), just about the time that I
finished booting from CD-ROM for an install of Solaris 9.

	I took it apart, and lubed the fan with instrument oil, but it
did not last too long.  So -- I pulled it entirely, measured all of the
dimensions with digital calipers (IIRC, the MM dimensions were more
useful than the inch ones), and dug through my Mouser catalog.  I found
two which fit as far as dimensions, voltage and all were concerned.  One
was with sintered bronze bearings, and the other with ball bearings.  I
opted to spend a bit more for the ball bearing version, and when it
arrived, I installed it, and it has since worked perfectly (so far).  I
got two fan assemblies, so I've got one spare for when it goes out next
time.

	So -- pull the case open, and power it up.  Look for the CPU fan
to spin up.  If it doesn't you have the same problem.  If it doesn't
*have* a CPU fan, it is a different version of the CPU board (and
probably a different speed), and you will have to look for other problem
sources.

	Best of luck,
		DoN.

-- 
 Email:   <dnichols@xxxxxxxxxxx>   | Voice (all times): (703) 938-4564
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.

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