Windows 7 can sleep but cannot hibernate

hibernatesleepwindows 7

On my Lenovo T400, Windows 7 can sleep but cannot hibernate.

When choosing hibernation, the screen turns black, but then there is one beep, and the screen turns back to what it was before choosing hibernation.

The problem seems changed and I didn't do anything.

When I choose sleep, the screen goes black, and all LEDs on the bottom of the lid do not change compared to before choosing sleep. i.e. the moon LED is never on and the wireless connection LED is never off. Does it mean the laptop cannot sleep?

When I choose hibernation, the screen turns black, and finally only two LEDs are on and they are battery and plug-in.

So now it looks like it can hibernate but not sleep?

Laptop specifications:

Operating System
    MS Windows 7 Home Premium 32-bit
CPU
    Intel Mobile Core 2 Duo P8800  @ 2.66GHz
    Penryn 45nm Technology
RAM
    1.9GB Single-Channel DDR3 @ 532MHz (7-7-7-20)
Motherboard
    LENOVO 2764CTO (None)
Graphics
    ThinkPad Display 1440x900 @ 1440x900
    ATI Mobility Radeon HD 3400 Series (Lenovo)
Hard Drives
    244GB Western Digital WDC WD2500BEVS-08VAT2 (SATA)
Optical Drives
    HL-DT-ST DVDRAM GSA-U20N
    AZCDW EFCPUZ452 SCSI CdRom Device
    AZCDW EFCPUZ452 SCSI CdRom Device
Audio
    Conexant 20561 SmartAudio HD

Best Answer

In Windows 7, "Hibernate" is not on by default. You have to enable this option with the command line powercfg tool.

Here is a tutorial:

http://www.sevenforums.com/tutorials/819-hibernate-enable-disable.html

I noticed Microsoft has "Fixit" scripts which might automate this as well:

http://support.microsoft.com/kb/920730

Related Question