This sounds familiar to me. I hope that I am wrong though. Sometimes Windows 7 Systems go into Sleep Mode but are unable to recover from this state. I have seen this only 3 times, 2 of those times it resulted in terminal damage to the mainboard.
Remove the battery from the machine and then leave the machine without the battery and without power from the charger for about 24 hours. This amount of time may seem excessive but this should fully eliminate any excess electrons (electricity) from every component on the mainboard. If after this approximate amount of time leave the battery out of machine and only attach the charger. Attempt to turn machine on and hopefully you should have LIFE.
If after all of this there is no change, I recommend returning it to your place of purchase for a warranty repair.
One very important thing to note. If you have send it for Warranty, 99 times out of 100 they WILL perform a full system recovery once repaired.
This is not what most repairers would normally do, it is only done by the manufacturers Repair Centres.
I hope that you have a backup of your most important files?
You MUST make it very clear that you would not like for them to do a system recovery, unless absolutely necessary. If they insist on performing the recovery, ask them if they can clone your hard drive if you buy another hard drive of the same size or larger. If they for some reason can't, then tell them that you wish to take the machine and new hard drive to a Computer Repairer and have them to perform a Disk Clone for you. Then after the disk is cloned you will bring it back for Warranty Repair.
If the repairer is a registered business then there should be no reason for the Repair Centre to void your warranty. I am a repairer, and I have performed this service before and have not voided a warranty for doing so.
Good luck, I hope you get LIFE back and do not have to send it away.
By the way I'm an Aussie, I spell Centre differently. Sorry if it confused anyone.