My iMac 27 2010 vintage goes to sleep and won't wake up...I have to push the on off button and hold till it shuts down and then re start...This is not good..Help please

My mac iMac 27 2010 vintage goes to sleep and won't wake up till I hold the on off power button....Then I have to restart as it is locked up....This it intermittent..
Help Please
Jim

Ops I replied to myself in error.....
Tom:
I performed the steps indicated but this morning when I clicked the mouse and hit the space key and clicked the track pad again as before nothing happens.
I hold the power button for a few seconds and the screen fills as if the computer was normally awakened but it is locked up.
Then I have to shut it down with the power button and then power it up as a reboot.
Not good...SMC reset didn't work....Throughout the day yesterday I put the computer to sleep and woke it up normally. It seems to be a overnight problem.
Am I going to have to shut it down everynight?
Jim

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Rosapeas wrote:
I like to listen to lectures, etc. and find it very annoying to have to press the on/off button to restart it every 10 minutes. Couldn't find a way to extend playing time in settings. Any suggestions? This is my first iPod and I am ready to take it back if I am unable to extend the playing time. Frustrating!
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"If music stops when the iPod nano screen turns off m Make sure the earphone port is free of debris. m Make sure the earphone or headphone connector is pushed in all the way. To see an illustration, go to support.apple.com/kb/ts3700."
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Ops I replied to myself in error.....
Tom:
I performed the steps indicated but this morning when I clicked the mouse and hit the space key and clicked the track pad again as before nothing happens.
I hold the power button for a few seconds and the screen fills as if the computer was normally awakened but it is locked up.
Then I have to shut it down with the power button and then power it up as a reboot.
Not good...SMC reset didn't work....Throughout the day yesterday I put the computer to sleep and woke it up normally. It seems to be a overnight problem.
Am I going to have to shut it down everynight?
Jim

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The damage has been done then
Take it to Apple and pay for a replacement
Here in the States a replacement cost $229
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My iMac 27 2010 vintage goes to sleep and won't wake up...I have to push the on off button and hold till it shuts down and then re start...This is not good..Help please

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