Why does my Mac get stuck in sleep mode to where I have to hold down the power button to restart?

Sleep or standby mode should allow your computer to conserve energy yet respond quickly to power back on when you need it. Most Toshiba laptops should exit sleep mode if you press a key on the keyboard or use the trackpad mouse. If the lid was closed, opening it should also wake up the computer. If none of these methods work to bring the computer out of sleep mode, you may have a power issue or software glitch. Causes Insufficient power can cause this problem, so try plugging in your Toshiba laptop before attempting to wake it from sleep mode. If this does not immediately fix the issue, your problem is more likely a software issue. If your laptop was shut down incorrectly prior to the sleep mode incident, it may be stuck on a blank screen that makes it appear to be in sleep mode when it actually is trying to start up.
Indications Press the power button for a few seconds to see if your computer will wake up. If it does, the laptop was not truly stuck in sleep mode, but rather went into hibernation mode. If your laptop is truly stuck in sleep mode, you may be able to force a shutdown by holding down the power button, but when you power back up it will move right back into sleep mode. In some cases, the power button may not shut down the computer from this mode at all.
Solution The best way to solve your Toshiba's problem is to completely remove all power from the laptop to ensure a fresh restart. Close the laptop's lid, turn over the unit and remove the battery. Also remove the power adapter cord from both the laptop and the wall socket. Open the laptop lid and press and hold the power button for approximately 20 seconds. This will drain any stored power in the backup battery. Wait a few seconds, then put the battery back in, plug in the laptop and press the power button to turn on the computer. It may start up with an error screen; in this case, select the option to start your computer normally. If the error recurs, start the computer in "Safe Mode" to see if a program running on your computer outside of the basic Windows operating system is causing the problem.
Further Help Sometimes this issue also requires holding down a specific key, such as "F8," when you restart. If the basic power drain and restart process doesn't work, you can use Toshiba's support website to look up further information for your specific model. Just click the "Product support" tab and enter your laptop's model information, then read through the support bulletins listed for your particular Toshiba model. Toshiba also maintains a support hotline at Call us : +1 850-610-1013 https://www.instantprintersupport.com/toshiba-printer-support

hold down the ctr-alt-delete button same time should bring it out sleep mode and allow you to restart the pc. Once back on desktop go to power settings and turn sleep mode off.

This tutorial will explain how to force your iPad to restart if it gets stuck or freezes up.
Forcing your iPad to restart will not cause any loss of data - with the possible exception of any work you were doing at the time the iPad and/or App froze, forcing you to restart it.

Click and hold down the Sleep/Wake button (located on the upper-right corner of your iPad). While you're holding down the Sleep/Wake button, hold down the Home button as well (located on the front of your iPad at the bottom). Hold down both buttons until your iPad powers off. It will reboot and start again with a small silver Apple image on the screen. It takes about 30 seconds for the iPad completely start up.

Resetting the PRAM may do the trick:
You reset the PRAM by rebooting a Mac and then immediately hold down the Command+Option+P+R keys, you will then hear the Mac reboot sound again, signifying your PRAM has been reset. You must hit the key combination before the grey screen appears otherwise it won't work.

you've tried rebooting, you've reset the PRAM, you've done it all, but your Mac is still behaving strangely. What next? In certain circumstances, resetting your Mac's System Management Controller (SMC) can be a solution. This is sometimes necessary to restore normal lower level system functionality to your Mac.

Here's how to reset the SMC on any type of Mac (and any version of OS X) and the type of problems that it may resolve.
When & Why Reset SMC on a Mac? Some Common Hardware Reasons

Typically it's power and hardware related issues that can be helped or resolved by resetting a Mac SMC, particularly if you're having these types of problems:

* Issues with your Mac's cooling fans and fan management: fans run constantly at high speed, fans run high despite low CPU usage and adequate ventilation, fans not working at all, etc

* Power management and battery problems: Mac isn't turning on, sleep isn't working, random shutdowns and reboots, battery isn't charging, Mac won't wake from sleep etc

* Light problems and improper lighting management: battery indicator lights aren't working, display backlighting isn't adjusting to ambient light changes, keyboard backlights not working, etc

* Video and external displays not working: display brightness functionality not working properly, target video mode isn't working properly, external display isn't working, etc

* General performance and functionality problems: abnormally sluggish behavior despite no CPU or disk usage, external ports not working, airport & bluetooth aren't showing up, external devices are not being found, etc

So now that you've concluded you need to reset your SMC (Note that the SMC is on Intel Mac's only), here's how to do it on MacBook's, MacBook Pro's, iMac's, Mac Mini's, and Mac Pro's. Notice that the reset instructions are different for MacBook and MacBook Pro's if you have an internal or detachable battery.
Reset SMC of a MacBook Air, MacBook Pro Retina, or MacBook Pro's with an internal non-removable battery

This is how to reset SMC on most modern Mac laptops:

Shutdown your MacBook Air / MacBook Pro
Connect the power adapter to your Mac
On the MacBook/Pro's keyboard, hold down the Shift+Control+Option keys and the Power button at the same time
Release all keys and the power button at the same time
Boot your Mac as usual

Here's the key sequence to hold down:

Reset the SMC of a MacBook Air or Retina MacBook Pro

Do keep in mind that by resetting the SMC you will lose power specific settings, like the time it takes to sleep a Mac and other customizations to power settings. No big deal, but if you have made many changes to your hardware behavior you will want to adjust stuff like sleep behavior again.
Reset SMC of an iMac, Mac Pro, Mac Mini

Resetting SMC is different for non-portable Macs:

Shut down your Mac
Disconnect the power cord
Press and hold the Mac's power button for 5 seconds
Release the button
Reattach the power cables and boot the Mac as usual

Reset the SMC of a MacBook or MacBook Pro's with detachable batteries

mac reset the smc Older MacBook laptops with a removable battery can reset SMC with the following approach:

Shutdown the MacBook/Pro and remove the battery
Disconnect the power adapter, hold the Power Key for 10 seconds
Release the power key and reconnect your battery and power adapter
Turn your Mac on
Let boot as usual

Hopefully that will clear up your problems, if not it might be worth a visit to the Apple Store or a certified repair center.

Happy New Year,
Kerry

Hold the power button in for 15 seconds or untill shut down then restart phone.
or remove the battery and hold power button in for 15 seconds,
reinstall battery and turn on your phone, ...hopefully helpful!

Do a hard reset.

1. Press-hold the Home button (big circle below the screen) and the Sleep/Wake button (on top of the iPhone) simultaneously.
2. Continue holding both buttons (Ignore the "Slide to power off") until the iPhone shuts off and begins to restart.
3. You may let go when you see the silver Apple logo.
4. You have completed a hard reset successfully.
5. Don't be alarmed that it takes quite a while to load from the Apple logo to the main screen. This is normal.

If this does not work, put into recovery mode and restore from itunes.
Step One
Open iTunes and connect the iPhone to your Mac.


Step Two
Press and hold the Home button and the Sleep/Wake button at the same time.


Step Three
As soon as the screen goes black release the Sleep/Wake button. Continue holding the home button until you iTunes pops up a message telling you that it has detected an iPhone in recovery mode.


The iPhone will look like this:

The device needs to be re-flashed.
turn the handset off by holding the home and sleep buttons down for 10 seconds. Once the unit powers off, connect the cable to your Mac/PC.
Now hold the home button down and press the sleep button for 2 seconds to power it back up, while still holding down the home button.
This will put the device in recovery mode and itunes will tell you that the device needs to have firmware installed.
if the device is jailbroken, you can download tinyumbrella or recboot to kick it out of recovery.

Though not too common, this does occur every once in a while on many Apple desktops/laptops. Usually an anomaly in the running processes gets stuck and prevents the system from awaking while sleeping.
To kill the processes, press and hold the power button for 7-10 seconds (or until the system powers off). Wait about 10 seconds and then power on the Mac.
I recommend performing a system update after logging onto the Mac and downloading any system & application updates available (and restart, if necessary, to complete).

You're most likely trapped in sleep mode. This can happen when the mac runs out of power in sleep mode.
Simply hold the power button down for 10 seconds, then press again to boot up as normal.

hold down power button until your machine shuts off. then power back on. you should be fine. if the cd is stuck in the drive, restart the machine and hold down the mouse button while restarting - the cd should eject itself.