Brendan Hoar wrote:
On Tue, 23 Aug 2005, Brendan Hoar wrote:
If so, it may be best to suggest that ivtv testers also use a
hard-power-down (PSU switch, cable remove or external power strip) in
addition to the soft-power-down most users are familiar with.
Daniel - care to repeat that test using the hard-power-off method?
Also, one thing additional: even when hard powered off, most PSUs will
continue to power the board with these signals for 5-10 seconds
additional as the fields slowly collapse in the transformer windings.
If the machine is open, you can usually tell, either by watching
mainboard LEDs (if they exists), pci card LEDs (if they exist) or
listening for the sound of the PSU finally giving it's last bit of juice
(a bit of a squeak sound, in my experience).
So, for real hard-power-off tests, I suggest pulling the plug and
waiting 20-30 seconds. :)
I had shut down the PC and turned off the power supply via the switch on
the back of the power supply itself. I *thought* turning the switch off
was the same as unplugging it, but I could be wrong. I'll try again with
the power cable pulled out.
All LEDs, fans, etc. were completely off within 20 seconds or so, and I
let it sit off for an additional 50 seconds before powering it back up.
Daniel
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