26 Mar
2010
26 Mar
'10
12:24 a.m.
On Wed, 24 Mar 2010 20:33:23 +0000 (GMT)
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Another very common one is that the startup resistor
of a switch-mode PSU
goes open-circuit while the machine is left on The PSU keeps working as
long as the mains is there, but if it gets turned off, or the mains
fails, of course it won't restart.
Some terminal servers and the like were very prone to this problem.
It's a very easy fix once you know which resistor to check.
The PSU of the
HP9000 C240 / C360 are prone to this. A few friends and
I had that problem. Several dead machines that would start only
sometimes when pluged in. Verry frustrating. Eventually a friend took a
weekend to reverse engineer the PSU and finaly found the faulty
resistor. We changed that resistor on all of our machines and they
work flawlessly since then.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/