My MBA does not start up from sleep

My MBA 13" mid 2013 (Mavericks) does not start up from sleep at times, or at least is very slow (1-2minutes)
As far as i remeber the only thing installed fairly resent is Virual Box.
It does connect to my iPhone when its connected to via USB but the sceen stays black.
Anybody else with this problem?

Hi bryan808-
It could be that the failure and installation of the update are simply a coincidence.
Back up. Then try removing all PCI cards and disconnect all external devices except your monitor, keyboard, and mouse. If that configuration will wake from sleep then start adding devices and/or cards one at a time until you find the culprit that keeps your machine from waking.
If you are really running a G4 you will have better luck posting in the appropriate section of that forum: Ctegory: Power Mac G4
Luck-
-DaddyPaycheck

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hi Parabola,
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