PC not consistently restarting after Back-UPS RS 650MI driven shutdown?

[Anonymous user]

Might someone explain the behaviour of the UPS/HP Laptop with power supply as observed below? I want to know how to consistently restore power to a PC when power is restored to a UPC:

A laptop has hibernation disabled (I am conducting tests before connecting a Back-UPS RS 650MI to a server). PowerChute Personal Edition 3.1.0 is used to 'shut down' https://trackeasy.fun/usps/ https://showbox.tools/ http://essaywriter.fun/ a laptop connected to the power supply and UPS 'Battery + Surge' outlet. 

After removing the UPS input power, the laptop shuts down as specified in the 'Runtime' settings. BIOS Boot Options on the HP laptop are set to 'Power On When AC Detected'.

Replacing the 240V input plug to the UPS after PC is shutdown does not restart the laptop (more often than not - it has restarted it 2 times - shortly after the shutdown). In instances where the PC doesn't restart automatically after replacing the 240V lead for UPS input power, it has actually restarted after:

1. the 240V UPS input has been removed again

2. The power button on the UPS has been pressed

3. One prong of an voltmeter made contact with a 'battery + surge' outlet pin

4. The 240V end of the power supply lead going into the battery+surge outlet has been removed and replaced

Point 1 above is a concern. Points 2-4 are inconvenient. 

Questions:

a. Is the above usual behaviour? 

b. Is there a way to make the PC restart when power to the UPS is restored (without doing one of the above)?

[BillP · Accepted solution]

Hi,

The UPS and PowerChute cannot restart a computer once powered off. That is the responsibility of the BIOS and motherboard. 

When PowerChute commands the UPS down the UPS waits 2 minutes and then cuts output. The UPS will wait for AC to be restored and then restore output to the battery / surge outlets. If AC has been restored during the 2-minute delay the UPS will still cut output to the battery / surge outlets wait 3 to 5 seconds and then restore output. Most power supplies will see that AC has been cut and restored within the 3 to 5 second delay.

If the system required longer than a 3 to 5 second delay the UPS should be replace with a model that allow for the delay to be adjusted. A SMT Smart-UPS allow for outlet group/s to be powered down and restarted with adjustable delays.