Hej,
Jeg har et problem med et Acer Idea mediecenter. Det er helt dødt, så
jeg troede først, at det var strømforsyningen. Jeg har nu målt på
strømforsyningen, og det eneste der virker forkert er signalet på det
grå ben - det går aldrig højt. Så vidt jeg kan forstå, er det et
statussignal, der viser, om strømf. er ok.

ATX/ATX 12V Power Supply Design Guide ver 1.1 foreskriver:
"PWR_OK" is a "power good" signal. It should be asserted high by the
power supply to indicate that the +12 VDC, +5VDC, and +3.3VDC outputs
are above theundervoltage thresholds listed in Section 3.2.1 and that
sufficient mains energy is stored by the converter to guarantee
continuous power operation within specification for at least the
duration specified in Section 3.2.11, "Voltage Hold-up Time."
conversely, PWER_OK should be deasserted to a low state when any of
the +12 VDC, +5 VDC, or +3.3 VDC output voltages falls below its
undervoltage threshold, or when mains power has been removed for a
time sufficiently long such that power supply operation cannot be
guranteed beyond the power-down warning time. The electrical and
timing characteristics of the PWR_OK signal are given in Table 14 and
in Figure 2.

Kunne det tænkes, at strømforsyningen er ok, og at dette ben
simpelthen bare ikke benyttes i denne strømforsyning?

http://pinouts.ru/Power/acer_idea_psu_pinout.shtml

Mvh.
Kim