Ultra 10 problems

Ultra 10 problems

Post by scubabr » Mon, 19 Sep 2005 07:50:48


Hi, I got a Ultra 10 440mhz on ebay, put mem and a drive in it, loaded
Solaris 10 and it ran like a champ for about a month. I lost power one
day, and the Ultra didn't come back up.

When I apply power to the switch on the power supply, the drive, fan
and cdrom power up, but no green light, if I cycle several times, I get
a green light, it runs POST but hangs or gets a watchdog reset

I thought maybe the NVRAM was horked so I got one off ebay, but I still
have the same problem.

Anyone got any ideas?

sb
 
 
 

Ultra 10 problems

Post by James Swee » Mon, 19 Sep 2005 11:56:38


Power supply is the first thing I'd suspect, probably some dried up
electrolytic capacitors in the output side, they tend to be worse when cold
so failure often shows up as a power supply that won't start up after losing
power.

 
 
 

Ultra 10 problems

Post by CJT » Mon, 19 Sep 2005 14:52:20


On a similar note, there's a row of capacitors on the motherboard
alongside the CPU among which I've seen failures (leakage and, in
one case, near total destruction of one of them).

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Ultra 10 problems

Post by James Swee » Tue, 20 Sep 2005 04:07:35


cold
losing

I suppose it was made around the right time for that, there was a huge
number of capacitors made with a defective counterfeit electrolyte, they
turned up in all sorts of electronics including a large number of PC and
other motherboards. Failure normally occurred within a year or two and
resulted in bulging leaking capacitors.
 
 
 

Ultra 10 problems

Post by CJT » Tue, 20 Sep 2005 07:23:52


Precisely. Sun stuff tends to be over-engineered, so it's taking more
than a year, though.

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Ultra 10 problems

Post by Kralizec C » Wed, 21 Sep 2005 06:15:41

"scubabri" < XXXX@XXXXX.COM > writes:





Try another power supply. I think, but I'm not 100 percent certain, that you
can use any ATX-type PC power supply though the problem would be with the
connector, if anything.

Craig.

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Ultra 10 problems

Post by gert » Thu, 22 Sep 2005 04:26:53

Kralizec Craig < XXXX@XXXXX.COM > writes:


My U5 runs with a standard off-the-shelf ATX power supply - I swapped
it because I wasn't sure whether it was a broken PSU that made the machine
crash every now and then (wasn't - was a software problem).

As the U10 is basically the same machine in a different case, I'd expect
a standard ATX power supply to work in there as well.

gert

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Ultra 10 problems

Post by Jorgen Moq » Thu, 22 Sep 2005 07:50:24


there is an extra power connector for UPA graphics on the U10.
if not using the UPA then its the same.
/Jgen