Screen won't come back on when held away from ear

Made a call, didn't want to leave a voicemail so I needed to hang up the call. Pulled the phone from my ear, and the screen would not come on. Pushed home, on/off, repeatedly, and got nowhere. Meanwhile I could hear the voicemail timing out, likely with my cursing something like "**** I can't even end this call!!" until finally it hung up on me. Still, the screen wouldn't come on. Finally it did, but it was too late. My voicemail was left, I couldn't change it. What the heck's going on? I never had any problems like this on my first gen iphone. Now, I've got my share of 3G problems, dropping calls, sloooooooowwwwwwww data, then all of a sudden it's fine. I've handled that by turning off 3G most of the time, thinking I'll be patient until Apple and/or AT&T get the phone and network running smoothly. But if I can't control the basic working of the most important aspect of the phone, namely, the PHONE, it's not much use to me at all.
Anyone else have the screen lock up in off mode? During a call? Is the only thing I could do stuff the phone under a pillow until it times out on the other end?

I started having face-detection issues after upgrading my 2G to 2.0x. I have a leather case with a cutout for the prox detector (had it for a year), but it's stretched a little and is now not centered; when I readjusted the hole, the screen immediately came back. It may be that 2.0 might have made it a little more sensitive to prevent false negatives (not detecting the face), where the partial coverage of the sensor before didn't affect it before but does now (false positive).

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External hard drive won't power back up when iMac wakes from sleep

I have the external hard drive connected via USB. I always put my iMac to sleep before going to bed and I wake it up when I come home from work. Except that when I do, the external hard drive doesn't power up. It still shows in Finder, but clicking on it's folders just opens them up as if they were empty. There's no access noise and the drive can't be ejected.I have to switch it's power off and turn it back on for it to spin back up.
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Not sure if you managed to get this issue resolved yet Marcus, but I too have a similar problem:
Currently I'm upgrading from Leopard to Lion (via Snow Leopard) on both an iMac and MacBook Pro (both Intel), but before I proceed with the OSX upgrade I wanted to back everything up. Thus far I have partitioned an external firewire drive (G Drive - one that is bootable), and cloned each machine using Carbon Copy Cloner to it's own partition (both GUID). There is plenty of space left over on each partition.
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When I restart and hold down Option on the iMac the only drive that appears is the HDD, not the other two selectable drives that are visible if I boot up on the MacBook Pro. On the iMac in System Prefs > Startup Disc I can see all 3 drives but when I select it and restart, the machine freezes on the grey loading screen and goes no further.
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Hello,
From the news page here...
http://xlr8yourmac.com/
See if it's related to this...
It also seems to be related to later OSX versions, like 10.8.x & 10.9.x
The 2012 macs (and later apparently) (also later OSX versions on earlier Macs can do it also), not waking normally from sleep after hours being in sleep. (noted here ...
http://www.xlr8yourmac.com/archives/feb13/022813.html#2012macswontwake
"Why 2012 iMac/2012 Mac Mini won't Wake After Hours of Sleep (Hibernates/Powers Off)")
The sleepimage file still reappears even if never slept. Delete it (hibernate off, etc) - within minutes its back.
A note on that here - http://www.xlr8yourmac.com/feedback/Chameleon_SSD_Optimizer.html
About iMac sleep...
http://forums.macrumors.com/showthread.php?t=1529750
Try this: "sudo pmset autopoweroff 0" and "sudo pmset standby 0"
http://xlr8yourmac.com/archives/sep13/091313.html#10.8.5SleepEjectTip
Two users reported that the opposite worked...
Try this: "sudo pmset autopoweroff 1" and "sudo pmset standby 1"

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When you post for help, please state which OS X is installed.
If you aren't sure, click About this Mac from your Apple menu 
Troubleshooting advice can depend on that information.

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hi smalley3,
Welcome to the Forums.
The flickering issue maybe due to a bad LCD cable or in some cases, a faulty GPU (the GPU is integrated to the CPU, and the CPU is soldered to the motherboard).
If there's still no image on the screen even after connecting an external display then you likely have a bad GPU.
In this case, I recommend you contact support for service (and also to see if there's a consideration that can be done on the warranty repair).
Support phone list
Regards

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It's possible you've got a 'hot corner' set up. If you have and move the mouse to a certain corner of the screen it'll do as you describe. Have a look in System Preferences>Mission Control, bottom left of the window click on the 'Hot Corners' button and see if there is anything in there.

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Screen won't come back on when held away from ear

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