Hi Rich,
On Monday 26 June 2006 13:44, Rich Koziol Inscribed Thus:
> On 25 Jun 2006 at 18:09, Bernie Cosell wrote:
> > On 25 Jun 2006 at 22:35, Kylde wrote:
> > > simple test: FIRMLY unplug and reconnect all connectors on the
> > > motherboard, after that I'd suspect PSU
> >
> > I'll do that --- as for the PSU ["Power supply unit"?] it is only
> > about a week old, so I wouldn't think it would be the problem [but
> > it could be a lemon, I guess]. How do you check for a flaky power
> > supply?
<--Snipped-->
> As to PSU testing, well I do not know of any "reasonably" priced
> testers, which would do anything useful. A good tester would have to
> apply load to all the sections of the PSU and be left on for a while,
> looking for voltage levels and have some logic to trap departure from
> nominal.
I use car headlight bulbs for load testing on both 12 and 5 volt rails.
I don't bother with the 3.3v one because it is derived from the others.
A 65 Watt bulb will draw about 5.45 amps at 12 volts and the same bulb
will draw about 2.25 amps at 5 volts and consume around 11 Watts.
I will leave you to decide how many bulbs to use !!
> Never assume that a new electronic product is functional. I have
> seen enough NEW things that were bad and wasted lots of time looking
> for something else. Once I even got two new devices that were both
> bad and almost pulled my hair out, as you certainly do not expect
> both to be bad :-))
>
> Regards,
>
> RichK
I agree ! The chances are that the new PSU is bad ! I few years ago I
remember an incident when a whole batch of PSU were duff. One of the
operators on the factory construction line was applying heatsink paste
but not putting the mica insulators under the power transistors !!
--
Best Regards:
Derrick.
Pontefract Linux Users Group.
plug at play-net.co.uk
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