I have been using my trusty HP Pavillion DV5-1251NR Entertainment Notebook PC for more than a year now. I had been using Windows XP x86 on it before switching over to Windows 7 x86 about nine months back. Since two months, however, I’ve started having this issue.
When I close the lid / press sleep button to put the notebook on sleep, and then try to wake it up, the keyboard works for about 5 seconds before dying – the keyboard isn’t dead.
I can wake the notebook by lifting the lid, pressing the power button, moving the mouse, or pressing any key as well, but it works just for a few seconds before dying. After that it doesn’t work unless i restart the system or hibernate and then resume it.
What could be the problem? I was able to use the sleep function without problems before. Now I have to change power plans to forbid sleeping at all.
EDIT: It may be worth mentioning that I've tried the following potential solutions. I'll keep updating if they work or not.
FIXING DEVICE MANAGER SETTINGS
My device manager shows the following entries under Keyboard and Universal Serial Bus Controllers. For all entries that allowed me to perform power management on them, I've ensured that the Allow the computer to turn off this device to save power option is unchecked.
- HID Keyboard Device (doesnt show power management tab)
- Standard PS/2 Keyboard
- USB Root Hub