No sleep function with power cord

My 2011 macbook pro does not go into sleep mode with the power cord on. The sleep light goes on, but does not go into "pulse" mode and the fans continue to run as well as the hard disk keeps running.
The issue started a few weeks back. I have tried switching off the internet sharing and other possible settings that might hinder the MBP going into sleep mode when the power cord is in. I have even down loaded PleaseSleep but that does not seem to function either.
Any ideas, anyone?
Anyone know if Apple is working on fixing this issue?
Seems like a minor issue, but if the MBP does not enter into sleep mode correctly I am afraid the built-up heat might damage disks, rams or screen.

OK, so it's not a hardware problem else it woudn't enter sleep under Guest login.
I'd first start looking at any programs you installed since it worked ok, maybe a utility or something?
Oherwise you can try to isolate the ones as I mentioned in Activity Monitor, by closing any programs that appear different from the ones when in Guest login. Not easy I know, but it might point to something stopping sleep working.
Also check in System preferences that all sharing is off, as this can keep the Mac from going into sleep. You can always turn these back on once you've established the cause.
Failing that, it looks like a trip to a local Apple dealer

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I book doesnt work with power cord only

Hello. I was just using my ibook g4 and shut it down. When i tried to turn it back on it worked for about 5 minutes then it shut off. I tried taking out the battery and holding down the power button for 5 seconds among other things. I gave up and borrowed a friends battery, he has the same model as me and that battery doesnt work either. I tried just using the power cord only and that doesnt work either. Do i need to take it in to a professional? I've tried just about everything.

Hey Caesar and Welcome to Apple Discussions,
So your header reads:
"i book doesnt work with power cord only "
Is that right? Will it run only on the battery?
If so this is from the manual:
"The computer runs with battery, but not with the power adapter plugged into
wall outlet
1. Try known-good power outlet.
2. Try known-good power adapter and power cord.
Note:
Verify that power adapter connector glows amber or green. If the power
adapter light is green, turn over the computer and press the battery button. The
battery lights should glow green and stay on if the power adapter is operating
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3. Reset the power manager by pressing the key combination Control-Option-Shiftpower.
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Fight On!

UPDATE:
Service was due and now that I saw the machine fail 4 times in a day doing the same process I knew I could duplicate the issue on demand. That's a big bonus.
Called Apple Care yesterday morning and the guy I spoke with read over the notes on my case after I told him what happened the day before (black friday, 4 shutdowns). While he didn't transfer me to a Product Specialist, he did talk to one for quite a while (I was on hold for about 20 minutes while he did this). He said I could ship it to Apple and they would look at it or I could take it to an Apple Store or Authorized Service Center. Thinking this was the next step I had secured a time at the Carlsbad Apple Store for late that afternoon (my usual & closest store, Escondido, was booked all weekend). They told me to take it in and reference the case number. The Product Specialist thought it sounded like a logic board and would duly note that diagnosis in the case history.
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Fight On!

No startup with power cord in laptop it just blinks 2 times.

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Hello , Welcome to the HP Support Forums! It is a great place to find the help you need, both from other users, HP experts and other support personnel. I read your post about the AC Adapter, and wanted to help! Have you tried testing the AC Adapter? You can use the following documents to assist you, if needed:HP Notebook PCs - Using and Testing the AC Power AdapterHP Notebook PCs - Performance Problems When Using a Non-Standard AC Power Adapter The blink code you provided usually indicates an issue with the BIOS. Please review this document to help:HP Notebook PCs - Computer Does Not Start and Emits an LED or Beep Code Please let me know if this information was helpful by clicking the thumbs up below.
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Hi,
I still use this old PowerMac G4 (hopefully Apple builds a new MacPro soon!) and when not using it, it is in sleep mode.
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http://support.apple.com/kb/TS1367
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No sleep function with power cord

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