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HD 5850 + HP w2408h = monitor will not sleep unless computer stays on

Last response: in Graphics & Displays
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January 26, 2010 7:44:48 PM

So for some reason, my monitor will only do the powered down sleep mode if the computer is on.

The moment the system sleeps fully (fans off, leds off, drives spin down, psu off), the monitor comes back on and displays "Check Signal Cable."

Anyone else have this problem?

I've updated all drivers and BIOS to the proper and current versions, and I've manually disabled the Hibernation using the PowerCfg command in an elevated DOS prompt.

It's driving me crazy.
February 2, 2010 2:13:50 AM

I think that's normal. Have you waited a while longer? The monitor should put itself to sleep again.
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February 2, 2010 2:19:30 AM

nope, it would stay on all night and still be doing it in the morning.

however, i fixed it...in a way that makes no sense. i first reset the monitor to default settings, then manually set a sleep timer. any timer at all works. i set mine to go to sleep at 3am, for example.

now, the monitor functions like it used to: if the computer turns off, the monitor displays "no signal" for 30 seconds, and goes to sleep.

no clue how that solved anything, but there you go.
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February 10, 2010 8:57:46 PM

Mate the same exact thing is happening to me... :( 

ill try to do what u did and see if it works, i was already considering buying a new monitor :p 

lets hope it works :D 
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March 29, 2010 2:25:57 PM


Would you explain further about the 'manually set sleep timer'. I am a novice at this and reading all I can to learn more...having the same problem, need a sleep timer! :sleep: 
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