[ale] Sun Ultra 40 / apcupsd / buzz-saw sound from powersupply.

[Jeff Hubbs]

Does the pitch of the sound fall when you pull a cable?  I've had to 
replace a bad fan in a SunFire V240 PS before...

On 5/5/11 11:03 PM, George Allen wrote:
> I'm now the proud owner of a Sun Ultra 40 (Dual Opteron) that I got
> cheap off EBay. It's a little dated, but I like it, and the case is
> awesome.
>
> We have lots of brownouts and power outages with the weather (sharing
> an old house) so I bought a UPS to condition the power and let it do
> graceful shutdowns. apcupsd works, it shuts itself down on battery
> power, BUT - once shut down, there is this BUZZ SAW sound from the
> power supply, like a relay or something that won't kick off while the
> UPS is still feeding it power. Pulling the plug from the Sun itself
> was my remedy the past couple of time... although if you turn the
> computer back on, it's fine -- the buzz saw-stops, regardless of
> whether your on AC or battery.
>
> I haven't tried it enough times to determine what the 'criteria' are -
> whether it's on/off-battery, what mode the UPS is in, etc... because I
> want to avoid my power supply screaming at me as much as possible.
>
> So, has anyone heard of this before?
>
> --George
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