开云体育

ctrl + shift + ? for shortcuts
© 2025 Groups.io
  1. Macsupportcentral
  2. Topics

My Power mac keeps restarting #Mac #Hardware

 

开云体育



On Oct 25, 2019, at 7:14 PM, Daniel Settles <denver1.dan1@...> wrote:

Howdy.

One should not plug large power-draining equipment like a laser printer
into a UPS battery box. ?

A. ?It's not necessary. ?One can print when power comes back on.

B. ?The primary purpose of the UPS is to allow enough time to save
files and shut down computer when the power goes off.


Yes, just computers and external drives that can be damaged if writing to them just when power goes off. If any other peripherals lose power then so what??

Denver Dan



On Fri, 25 Oct 2019 16:36:59 -0400, Barry Austern via Groups.Io wrote:

I would not run a desktop machine without a UPS. You can get a
reasonably decent one for $70 or less. When I start my laser printer
I hear my UPS click, so I assume that maybe without it my Mac would
lose power.

[|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|][|]

iSent from iDan's GyazMail on my MacPro




—
Barry Austern
 

Randy B. Singer wrote:
I DO wholeheartedly agree that everyone should have a UPS.??If you experience one nasty brownout with a huge following surge in?power, it will have paid for itself. ?I also note that folks who have USP's?have Macs that tend to be remarkably trouble-free and long-lived.

I’ve only gotten CyberPower devices for my full-sized UPS needs for years:
  • There’s one where the FiOS cable comes into the house, and the router and other electronics live.
  • There’s one at the TV, supporting the set-top box, the Blu-Ray player, the Apple TV, and a couple of other low-requirement digital devices.
  • There’s one supporting my wife’s full-size Linux box and accessories.
  • I have a much smaller unit for my laptop and accessories.
  • And I pay a monthly rent to the power company to have a whole-house surge protector at the power meter, which comes with a $10,000 insurance policy.

--?
Jim Saklad
jimdoc@...
 

Great info, Dan.

It reminds me of one I solved remotely. It was very rare, and not likely to apply to others.

The user lived in Thailand, and his Mac would restart intermittently. He had checked the 3 items Randy listed. He didn't seem to have the power noise we are discussing. He finally disclosed that his outlets did not have a ground, typical in his location. He was using a 3 to 2 adapter. I suggested that he try a temporary ground wire. Not easy in a concrete building. He resisted, but finally tried it. When he did the problem went away. He then had a permanent grounded outlet put in, professionally.

Sent from my iPad,

Brent

On Oct 25, 2019, at 5:29 PM, Daniel Settles <denver1.dan1@...> wrote:

Howdy.

I'll add to this.

I used to visit a private girls school near Middleburg, Virginia, to
deal with several Macs. The human buildings were very old with old
electricity and no central A/C. The horse barns for the rich girls'
own horses were nicer than the dorms or office buildings

They moved a graphics design office to a different room then installed
a large 110 volt AC window unit on the same circuit as the Mac,
printer, scanner, etc., and every time the AC's compressor kicked on
the Mac shut down.

It took putting in a separate electrical circuit for the AC to solve
the problem.
ihor43us
 

Many thanks to the responses and suggestions. I apologize for not getting the name straight. It is a Mac Pro from 2008. I clean the dust regularly - you don't realize how dusty the house is until you open the case.

I also have a 21"? iMac bought at the same time which also exhibits that behavior and is also cleaned regularly. Actually bought 3 and two are over heating. My daughter does not use hers much.

The systems are on UPS with surge protection so I think that narrows it down to heat/fans. These fans are speed controlled I believe so the issue could be the fan or the controller.
?
Is there anyone here that has replaced either? The sources on Google are non-specific and I do not want to put a non-Mac part in them so I was looking for a link to an inexpensive Mac parts store.?

There is the possibility that parts for octogenarian computers are in short supply so the question is will fans/controllers from younger Macs fit? I would think that those parts would be common over many generations.

Thanks again for all the answers and apologies for not responding sooner. A site I look after got hacked and I have been up to my hairline in php code delivering eviction notices .......

Emoji
 

开云体育



On Oct 26, 2019, at 6:34 AM, ihor43us via Groups.Io <ihor43us@...> wrote:

There is the possibility that parts for octogenarian computers are in short supply so the question is will fans/controllers from younger Macs fit? I would think that those parts would be common over many generations.

Possibly so for your “Cheese Grater” Mac Pro, but not so for the iMac. Peeking at MacTracker, I was astounded to see that the current shape of the iMac has endured for about 15 years. I’d wager that there have been many minor and some major changes in the precise shape and location of its innards over the years as Jony Ives’s minions have waged their battle to keep it svelte on the outside but buffed on the inside (sorry for the technical terms). However, Mac sites such as iFixit and Other World Computing maintain well categorized inventories of Apple parts long after Apple stops selling them. If two iMacs and one Cheese Grater Mac Pro are overheating in your environment, I would worry a LOT about your wiring unless your house is also filled with cats and dogs or other hair-shedding mammals.

Jim Robertson
 

Sent from JT's Ipad - maybe using voice dictation!

On Oct 25, 2019, at 17:24, Brent via Groups.Io <whodo678@...> wrote:

I would feel insecure with a $70 UPS. I guess our posts passed on the internet, because I just posted about laser printers causing surges. The momentary outage is not the problem, it is the surge that does the damage.
Don't even think of putting a laser printer [or any other device with a large motor] on a consumer grade UPS.
 

Not what I said and why would you? You want the laser printer or large motor, outside the USP, preferably on a different circuit.

Brent,
on my iPad

On Oct 26, 2019, at 10:42 AM, Julian Thomas <jt@...> wrote:



Sent from JT's Ipad - maybe using voice dictation!

On Oct 25, 2019, at 17:24, Brent via Groups.Io <whodo678@...> wrote:

I would feel insecure with a $70 UPS. I guess our posts passed on the internet, because I just posted about laser printers causing surges. The momentary outage is not the problem, it is the surge that does the damage.
Don't even think of putting a laser printer [or any other device with a large motor] on a consumer grade UPS.

 

开云体育



On Oct 26, 2019, at 1:42 PM, Julian Thomas <jt@...> wrote:



Sent from JT's Ipad - maybe using voice dictation!

On Oct 25, 2019, at 17:24, Brent via Groups.Io <whodo678@...> wrote:

I would feel insecure with a $70 UPS. I guess our posts passed on the internet, because I just posted about laser printers causing surges. The momentary outage is not the problem, it is the surge that does the damage.

Don't even think of putting a laser printer [or any other device with a large motor] ?on a consumer grade UPS.

Or, for that matter, on any UPS. If your power goes out you will not print the page it is then printing, so you might lose one sheet of paper and a half a page of toner. A UPS is designed such that you can shut down properly and not damage anything, so all you really should put on it is your computer, monitor (if separate, so you can see it to shut down) and any external drives.?




—
Barry Austern
ihor43us
 

Thanks again for all the suggestions.?

I took out the ATI Radeon HD4870 and took it apart for the first time in 11 years. While I clean out the Mac itself, I have never taken the GPU apart - never thought it would need that.
Man, was it plugged up. The heat sink had no openings left for air. Cleaned it out and all is fine again. So the recommendation to clean it was right on - I just never took it to mean take the GPU apart.

Thank you.

Ihor

21 - 29 of 29