I recently purchased HP DV7tQE laptop (i7-2760QM CPU, 16GB RAM, 120 GB SSD + 750 HDD, win7 x64). When I close the lid (or click Sleep in start menu), sometimes it would turn off the display but backlight on keyboard would be still on, harddrive would make sounds etc - and there is no way I can put back to live. If I wait long enough (5-10 minutes) - it would eventually shut itself off - but then when I start it, it loads windows and displays "Windows was not shut down properly" screen. All my work is lost.
As I said, it does not happen all the time. If I restart Windows and put it into sleep - then it will work. However, if I work for some time, it might go to sleep properly, but more often than not, it will hang.
Any ideas? what should I look at?..