HT3964 computer does not respond to the power button when pressed

macbook power button inoperative, computer dead... power cord hooked up.. what next?

Hello 007grams,
Take a look at this article I found for you while researching your issue.
Troubleshooting: My computer won't turn on
http://support.apple.com/kb/TS1367?viewlocale=en_US
Resolution
If your computer won't turn on, try each of these steps:
Verify you have a good connection from your Mac to the wall outlet by confirming the power cord and adapter if present are securely connected and plugged in. To check if the wall outlet is working, plug in a lamp or other electrical device.
If the wall outlet is working and you continue to have no power try another power cord or adapter if available. If it works you may need a replacement cord or adapter.
Note: See Apple Portables: Troubleshooting MagSafe adapters for further troubleshooting with MagSafe adapters.
Disconnect all accessories that are plugged in to the computer, such as a printer, hub, or other mobile device.
If your Mac supports user-installable memory, solid state drive, or hard drive, and you recently installed any of these, make sure they are installed correctly and are compatible with your computer. If possible, reinstall the original memory or drive into the computer to find out if the behavior persists afterwards.
MacBook Pro: How to remove or install memory
MacBook: How to remove or install memory
Mac Pro: How to remove or install memory
Mac mini: How to remove or install memory
iMac (27-inch, Late 2012): Installing or replacing memory
iMac: How to remove or install memory
Reset the SMC.
If you are still unable to start up your computer after trying each of these steps, visit an Apple Store or Apple Authorized Service Provider (AASP) for further diagnosis. If you plan to visit an Apple Retail Store, make a reservation at the Genius Bar using http://www.apple.com/retail/geniusbar/ (available in some countries only).Note: Diagnostic fees may apply for issues not covered under warranty or the AppleCare Protection Plan (APP).
Cheers,
Sterling

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HT3964 macbook pro early 2008 does not respond to the power button

I bought a second hand mbp early 2009.
All seemed well when I tested it prior to buying.
But, now 2 days later, the mbp is completely dead.
In the past 2 days I had sudden power-downs (suddenly switching of completely).
First I thought it was the battery, which I overlooked when buying. But now I fear it is more serious!
It did work. And it worked like a charme. I even upgraded the os to mountain lion.
But now I cannot get it to work at all
Any help? Please...

Shootist007 wrote:
Right if the Nvidia chip fails completely it takes the complete computer down with it. No start no sign of life.
If after reading the Apple arcticle I link to and if you did a little research on the failures you may of figured that out for yourself.
Google Baking a Apple Mac Logic board or Fixing MBP 2008 Nvidia chip failures.
You wrote:
"I say did, because I already swapped it.".
What does that mean, you lost me.
As for your comment on how bright I may be, I'm bright enough to know not to buy a 3 or 4 year old Mac notebook.
Good Luck.
I swapped de mb for another one. the person that sold it to me took it back.
contrary to most people I do not sneer at other people. My remark at the end is pure an observation. What you make of it, is your doing, not mine.
I buy a second hand mb simply because I need a portable, but cannot affort a new one (for the moment).
there is nothing wrong with a 3 year old mb, apart from that it is 3 years old. of course there is a higher risk of failure. that is (partly) why the price is lower.
keep cheerful and travel light.

Notebook GX740 does not react to the power button

Hello. Notebook GX740. When you upgrade NB Camera / VGA / EC Firmware laptop hangs. 1 hour turned it off the power. Now does not react to the power button. How can I restore NB Camera / VGA / EC Firmware??? The file downloaded from the website EC1727EMS1.404

You will need to perform EC reset after EC flash.
Remove battery and disconnect AC adapter, and then reconnect them.
Try power on the unit.

HT3964 My Macbook Pro did not respond to the power button, and I ended up resetting the smc. After that, it would start, but the keyboard would not respond, pnly the trackpad. On the screen there is a symbol with ahorizontal white bar and a row of empt

After resetting the SMC the keyboard is inoperative. On the start screen appears a traslucent square with a horizontal bar in white, and a row of empty dots below (the same format as for example the brightness symbol). I cannot turn the Mac off with the power button, only with the trackpad, clicking on the turn off symbol on the screen.
When I try to login with my username, no characters appear as I type.
I can login as a guest, but from there I can do nothing, because the keyboard is still inop and if I wanted to, for example, have the software updated, I need to type an admin login, which is impossible.
Thanks for your help

What happens if you close the lid? Sleep?
In your place I would use sleep state to reset PRAM, as it can resolve your graphical mess.
Your keyboard likely was not powered after SMC/PRAM failure, so you will need to open MBP cover without opening the lid and disconnect battery power cable with insulated tools from logic board, wait for 5-10 minutes, then try to reset PRAM while keeping cover

DPG4 does not post -- but the power button lights up

I'm totally lost at this point... My old PowerMac no longer powers on. I managed to somehow get it to boot when I had this problem once before, but this time I'm getting nowhere. When I press the power button, the button itself still lights up -- but that's as far as it gets; as soon as I take my thumb off of the button, it goes dark, and the system doesn't even try to boot. The steps I've taken so far to troubleshoot this are: removed all third party components, (including a 512MB DIMM, a USB2 PCI card, and a 54g wireless PCI card, as well as several USB devices) removed the power cord and backup battery and pressed the PMU reset button. Does anyone have any other suggestions?
Fortunately, this is no longer my primary system -- a white 24" Intel-based iMac takes that title now -- but it would be awfully nice to be able to install one of my Leopard licenses (from the family pack) on the old G4 to use it as my Time Machine server.

Thanks for the suggestions so far.
Additional information: I just successfully booted the machine, through a series of (what I would call) almost random configuration adjustments. Here's what I did... I opened the box, yanked the backup battery and pressed the reset button again, and tried to power it on. I then noticed that the optical drive was connected to the ata33 interface. Thinking that this is a bit odd, I swapped it to the ata66 interface. (My two internal harddrives are both connected to the separate ata100 interface... is this a truly bizarre set of interfaces, or is it just me?) I then pressed the power button -- and the machine fans started blowing, and then stopped. Suddenly very interested, I promptly disconnected the power cable from the optical drive, and then tried again -- no dice. I pressed the power button a few times just to see what would happen, and I observed the fans on the rear of the power supply and one case fan were spinning up for just a bare moment about every few times I pressed the button. I then disconnected the main power interface cable from the motherboard, and did the whole pmu reset/battery out/pmu reset/battery back in series, and then replaced the power interface and pressed the power button. Voila! It powered up, so I promptly logged into the site and started typing.
Now, here's my thoughts: I would assume that the fact that it is presently booted up and running (albeit without the optical drive) rules out a failure of the front interface; do either of you concur? Also: I have not yet taken my multi-meter to the power supply, but my first instinct is to think that the power supply is just on the edge of my current wattage requirements, and disconnecting the power from the optical drive is what allowed me to boot. Correspondingly, I would speculate that this could be caused by either 1) my add-ons have exceeded the 400 watt output of the power supply, or 2) the power supply is indeed starting to fail.
So... since the machine is running at the moment, are there any diagnostic programs I could run against the power supply to find out if it's operating at design specifications? I'd expect this would be more accurate and more safe then me poking around with a multi-meter -- and it would be less expensive then a trip to a Mac repair shop, though that is certainly the next step if the power supply is dying.
Thanks again for your advice!

The keyboard in my MBA is not responding. The power button works fine and backlight is operating, but nothing else. I have tried SMC and Terminal but nothing helped. Would anyone have any idea what the problem might be? Thank you for your time.

MBA keyboard not responding. SMC didn't work.

If the USB keyboard still works after you log in, then the machine needs to be repaired.
Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.
Back up all data on the internal drive(s) before you hand over your computer to anyone. There are ways to back up a computer that isn't fully functional—ask if you need guidance.
If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.
Keeping your confidential data secure during hardware repair
Apple also recommends that you deauthorize a device in the iTunes Store before having it serviced.
*An SSD doesn't need to be zeroed.

New macbook pro fail to respond to the power button

Why did my new macbook pro fail to respond to the power button?
I have a new 13" MacBook Pro Retina (10.9.1) which I have been using for about 3 weeks. I am new to Mac and am in the process of making the transition from Windows XP.
Today, with the battery at 100% and the power lead disconnected, I left the mac with the lid closed but, when I returned, it did not come back to like when I opened the lid. Also, it would not respond to the power button.
After some web searching, I managed to get it back to life after resetting the SMC.
Is this a software problem, or is it more likely to be a hardware problem?

Highly unlikely that software is involved - especially since resetting the SMC corrected the problem.
Unless it happens again, I would forget it. If it occurs again, take it in for warranty service.
Barry

Flashplayer pop up box "Requesting permission to store info on my computer" does not respond and will not go away. How do I get rid of it. It is most annoying as it stays right in the middle of the screen.

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Move cursor onto video. Right click. Click Settings, Click the "never ask again" box. Then click Close. That will work.
For some reason, that always worked for me, but in the last two days, it does not work, and it seems to freeze on the
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My hp Pavilion p6230y died. It will not boot. The power button LED does not lite.

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This question was solved.
View Solution.

Usually when the fans twitch it means that the CPU is OK. That is not a theory, it is practical experience. My next step is what I suggested to you. Clear the CMOS settings. That is usually a last ditch effort. I always have a spare PSU around to verify that it is not the culprit.
Follow the troubleshooting on this HP web document to check your PSU. Just testing it with a meter does not help much because it can fail under load. The multimeter does not put a load on the power supply unit. Even those cheapie PSU testers are pretty worthless, except for a cursory test.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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This very strange and frustrating and I don,t know what to do.
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Try to remove some of Firefox plugins or addons, maybe there is Babylon toolbar.

The home button for my ipod touch 4th generation does not respond all the time, What do I do?

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Try:
http://snapguide.com/guides/calibrate-your-home-button/?utm_expid=69945963-15
fix for Home button
iPhone Home Button Not Working or Unresponsive? Try This Fix
- If you have iOS 5 and later you can turn on Assistive Touch it add the Home and other buttons to the iPods screen. Settings>General>Accessibility>Assistive Touch
- If not under warranty Apple will exchange your iPod for a refurbished one for:
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Apple Retail Store - Genius Bar
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Apple - Support - iPod - Service FAQ
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Why does Satellite Pro A300 not start when the power button is pressed?

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I bought Adobe Elements 12; I cannot use panorama photomerge, I have followed the directions to go to Full Edit mode in edit workspace choose File New Photomerge. However the Photomerge does not work, it does not respond. The only thing I can come u

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My macbook pro was on sleep mode, and when i opened it again, it wouldn't come off the black screen. It is very hot and also doesn't respond to the power button...

My macbook pro was "asleep". I opened it later, and the screen wouldn't change from black.. The bottom of the laptop is very hot and making a hissing/whirring sound. I tried hitting the power button to turn it off, but the conditions just stayed the same. It doesn't respond to the power button, and the screen just stays black. How do i fix this?!

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HT3964 computer does not respond to the power button when pressed

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