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

S

sim667

macrumors 65816
Original poster
Dec 7, 2010
1,390
2,915
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

mulo

macrumors 68020
Aug 22, 2010
2,267
5
Behind you
knowing nothing about it i would think a spike would cause some "safety switch" to trigger, then requiring power off
 
A

All Taken

macrumors 6502a
Dec 28, 2009
780
1
UK
sim667 said:
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?
Click to expand...

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
 
S

sim667

macrumors 65816
Original poster
Dec 7, 2010
1,390
2,915
All Taken said:
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
Click to expand...

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.
 
S

sim667

macrumors 65816
Original poster
Dec 7, 2010
1,390
2,915
sparkie1984 said:
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.
Click to expand...

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.
 
Macman45

Macman45

macrumors G5
Jul 29, 2011
13,197
135
Somewhere Back In The Long Ago
sim667 said:
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.
Click to expand...

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.
 
M

mlts22

macrumors 6502a
Oct 28, 2008
540
35
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.
 
S

sim667

macrumors 65816
Original poster
Dec 7, 2010
1,390
2,915
mlts22 said:
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.
Click to expand...

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