Why Laptop not start?
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OP
Joined: Dec 2009
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I've only had a laptop a couple of years. Every few months, even fully charged it wont start. I hold down on power button, go away try again. Finally starts. What is this about? thanks!
I know that's vague, but that's the pattern.
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Re: Why Laptop not start?
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Joined: Aug 2009
Likes: 15
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Joined: Aug 2009
Likes: 15 |
Have you ever tried resetting your PMU or, as the case may be, SMC?
The new Great Equalizer is the SEND button.
In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire
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Re: Why Laptop not start?
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OP
Joined: Dec 2009
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Artie, thanks, what are abbreviations.
First pram? I've never seen it fix anything.
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Re: Why Laptop not start?
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Joined: Aug 2009
Likes: 15
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Joined: Aug 2009
Likes: 15 |
> First pram? I've never seen it fix anything.
You've just never run into an issue for which it was the appropriate troubleshooting technique.
PMU = Power Management Unit
SMC = System Management Controller
SMU = System Management Unit
(Sorry... I forgot about SMU in my first post.)
The new Great Equalizer is the SEND button.
In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire
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Re: Why Laptop not start?
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Joined: Aug 2009
Likes: 7
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Joined: Aug 2009
Likes: 7 |
what are abbreviations.
First pram? I've never seen it fix anything. PRAM is Parameter Random Access Memory. As Artie knows from personal experience, it can sometimes fix an issue. To see some other possibilities, read Mac OS X: What's stored in PRAM.
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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Re: Why Laptop not start?
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OP
Joined: Dec 2009
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I tried re-setting Pram twice on the laptop. It did not work, just restarted as normal -- why could that be?
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Re: Why Laptop not start?
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Joined: Aug 2009
Likes: 7
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Joined: Aug 2009
Likes: 7 |
Did you try Artie's other suggestions?
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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Re: Why Laptop not start?
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Joined: Aug 2009
Likes: 15
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Joined: Aug 2009
Likes: 15 |
Did you try Artie's other suggestions? WRONG!I did not mention zapping PRAM let alone suggest it. My "other suggestions" are the only suggestions I made.
The new Great Equalizer is the SEND button.
In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire
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Re: Why Laptop not start?
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OP
Joined: Dec 2009
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so don't bother with Pram?
SMC = System Management Controller is this 2nd suggestion? don't know what it is.
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Re: Why Laptop not start?
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Joined: Aug 2009
Likes: 7
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Joined: Aug 2009
Likes: 7 |
Troubleshooting: My computer won't turn on has links for resetting SMC or PMU with various models. You didn't say which kind of laptop you had so that article should give you a link for your specific type of computer. For a summary of SMC, read Intel-based Macs: Resetting the System Management Controller (SMC).
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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Re: Why Laptop not start?
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Joined: Aug 2009
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I don't think you've mentioned what you have for a laptop. Is it an intel (macbook/mbp) or something older?
I work for the Department of Redundancy Department
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Re: Why Laptop not start?
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OP
Joined: Dec 2009
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Re: Why Laptop not start?
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OP
Joined: Dec 2009
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SMC, says do as very last resort. But that point would be when the laptop wont start, so can do anything at that point. This is too intermittent to even know anything definitive.
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Re: Why Laptop not start?
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Joined: Aug 2009
Likes: 15
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Joined: Aug 2009
Likes: 15 |
> "But that point would be when the laptop wont start...."
Is that a quote from an Apple or other document or your own inference?
The new Great Equalizer is the SEND button.
In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire
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Re: Why Laptop not start?
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Joined: Sep 2009
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I've only had a laptop a couple of years. Every few months, even fully charged it wont start. I hold down on power button, go away try again. Finally starts. What is this about? thanks!
I know that's vague, but that's the pattern. Push harder, hold longer... wait for chime. Simple.
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Re: Why Laptop not start?
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Joined: Aug 2009
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To clarify, are these the same systems/units, just different names for different configurations/hardware?
Alex 3.1 GHz 13" MacBook Pro 2015, 8 GB RAM, OS 10.11.2, Office 2011, TimeWarner Cable 2.8 GHz Xeon Mac Pro 2010, 16 GB RAM, OS 10.11.2, Office 2011, LAN
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Re: Why Laptop not start?
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Joined: Aug 2009
Likes: 15
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Joined: Aug 2009
Likes: 15 |
To clarify, are these the same systems/units, just different names for different configurations/hardware? I can't answer that with specifics, Alex, but I think I can safely say that they're more or less equivalent in functionality, with PMU, I believe, being applicable to PPC Macs and SMU and SMC being applicable to various Intel Macs.
The new Great Equalizer is the SEND button.
In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire
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Re: Why Laptop not start?
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OP
Joined: Dec 2009
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Hal, you may have the answer there! (I hope)
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