What would mac 30 macs unable to power on at the same time?

[sim667]

Came into work this morning, and none of the imacs would power on.

Tested the electricity trunking, all fine. It turned out they all needed the power cutting for 10 seconds, then they'd power on fine after that.

Would a power spike cause that?

 

[mulo]

knowing nothing about it i would think a spike would cause some "safety switch" to trigger, then requiring power off

 

[All Taken]

Came into work this morning, and none of the imacs would power on.

Tested the electricity trunking, all fine. It turned out they all needed the power cutting for 10 seconds, then they'd power on fine after that.

Would a power spike cause that?

They were all asleep and you didn't give them enough time to 'wake'?

Your wiring is faulty and not enough power was being received to power the machines after they had shut down due to perhaps a power cut, when you reset the power it supplied the correct load. Check your wiring for faults?

Thats my best guesses

 

[sim667]

They were all asleep and you didn't give them enough time to 'wake'?

Your wiring is faulty and not enough power was being received to power the machines after they had shut down due to perhaps a power cut, when you reset the power it supplied the correct load. Check your wiring for faults?

Thats my best guesses

They definately weren't asleep..... I've been looking after macs for a long long time.

Wiring is fine, we've had an electirican out to check it all...

Im guessing there was a power spike over the weekend.

 

[mus0r]

Reset the power management.

 

[iMacC2D]

Removed.

 

[sparkie1984]

It's too much load powering all on at once.

When we do computer rooms you need to install a breaker to take a large start up current.

 

[sim667]

It's too much load powering all on at once.

When we do computer rooms you need to install a breaker to take a large start up current.

That might be it, all our computers are set to boot up at 8.30am

We've never had the problem before...... Ill have to keep an eye on it.

 

[sparkie1984]

Could be playing up now due to excessive wear on the breaker.

As a qualified electrician that's where I'd be looking first, had it before at schools

Could you stagger their turn on times

 

[Macman45]

They definately weren't asleep..... I've been looking after macs for a long long time.

Wiring is fine, we've had an electirican out to check it all...

Im guessing there was a power spike over the weekend.

Yep, we had this a while back here too....Depending on your power settings for the machines, I'd say that's exactly what happened...A spike or a brown out. I'm guessing you are surge protected so no damage will have been done, but re-setting SMC on them would be a good idea.

 

[mlts22]

I'd reset the SMC. To make things easier, can the OP stagger the time the Macs come on? This way, the initial inrush of everything starting (inrush current to spin up HDDs and fans) isn't hitting the circuit all at once.

 

[sim667]

I'd reset the SMC. To make things easier, can the OP stagger the time the Macs come on? This way, the initial inrush of everything starting (inrush current to spin up HDDs and fans) isn't hitting the circuit all at once.

Im not the actual tech, but ill suggest it to them