HP Pavillion won't bring monitor back from sleep mode

It's the nature of sleep / hibernation mode. Try removing hibernation and set to home / office. It's like we want use this option, but MS and hardware never really sync. What I'm trying to say, it never seems to work as it should.

You should be able to just press the main system unit power button to wake up your 'sleeping' computer which will then resume your Windows desktop and bring you back to the Login panel if you have a password set for your account.

dont know how old monitor is but it may be time for an upgrade OR the pc/laptop/desktop? may need some setting changes for your wake time, sleep time, intervals, etc.? Sometimes if laptop,, you have to tap the power button to wake up after extended sleep times.

1. you will need to go into you BIOS settings for the mother board to disable the sleep mode.
2. You also have a " sleep mode" in your Windows environment.
Check how to in the "help and support" link at the start button or Windows Orb ( for Windows 7)

Does it do the same when you use this monitor with other PC, new VGA cable, just need to narrow down the problem first before start taking the monitor apart.
See pictures of what usually goes bad (mostly failed capacitors) with monitors:
http://s807.photobucket.com/home/budm/allalbums
Post back what you find so we can guide you further

- your comp is in hibernation mode
- go to control panel>>power management>>put to NEVER the sleep mode,hibernation,HDD,battery
- restart system

In windows click start, control panel, power options. On the first page"when the computer is plugged in" turn monitor off NEVER on the hibernate tab uncheck enable hibernation if checked, also disable sleep mode

This could be a problem related to Vista hibernate file. Please verify the steps here
and let me know if that solved your problem:

This could also resolve problem with a tower: http://annoyances-resolved.blogspot.com/2009/08/laptop-wont-resume-from-sleep.html

This is a common problem with HP Pavilion laptops, including mine. Check and make sure there are no non-OS programs running that are trying to control power settings (like a power monitor program running in the system/task tray) and then turning of hibernation in the POWER SETTINGS and then for all "WHEN I CLOSE LID" and "WHEN I PUSH THE SLEEP BUTTON" and "WHEN I PUSH THE POWER BUTTON" select DO NOTHING, then APPLY. Then SAVE SCHEME AS and choose any new name. This will disable all sleep modes forever, but at least you can get on with normal use.

If you are geeky, try going into the BIOS and DISABLING anything marked WAKE ON, and disabling anything having to do with automatic power features, and then try hibernating and so forth normally through the OS again. Sometimes this works if there are conflicting settings in the BIOS also trying to increase power efficiency.

Good luck...

Hit the keyboard keys. It is better to just turn sleep and hibernate off and just use a screen saver or tun it off.