Macbook goes to sleep but does not wake-up

Question

Hello, my Macbook is 3 years old and I am now having trouble with it. Whenever it goes to sleep, it does not wake up. This includes if I close the screen and then when reopening, it will not come back on. I am on version 10.4.11
Below is the power settings on the machine in case it is something to do with the battery/power source.
Thankyou so much if anyone could help fix the problem or point me in the right direction to resolving the issue.
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 180
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 180
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 180
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 180
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: No
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 4990
Remaining Capacity (mAh): 4980
Amperage (mA): -1112
Voltage (mV): 12389
Cycle Count: 231
AC Charger Information:
Connected: Yes
Charging: No
Hardware Configuration:
UPS Installed: No

Answer 1

Hmm... I've had this macbook for a while now (?? a year maybe ??) and about 2 months ago I started having this exact issue, close lid to sleep returning it would not wake and a hard reset (hold power for 5+ seconds) is required.
I too discovered such links as this and also the older (also unanswered):
http://discussions.info.apple.com/message.jspa?messageID=8690782
But as others have said there doesn't appear to be a solution?
RESET THE SMC (http://support.apple.com/kb/HT3964) does appear to work, however the issue returns again after a few days or weeks... I cannot find anything that guarantees to return the issue it just starts happening again after a while.
The battery appears to be in okay condition, although I think it might run down a little faster now days than when I first bought it, but I assume this is to be expected.
I also had suffered from what sounds like an issue with wifi weirdness - signal would drop to 0% suddenly, no longer "see" the wifi hub that it has been using forever (although it still, randomly, sees other nearby hubs) for no apparent reason, and that kind of thing - all these times the only solutions that have worked have been to stuff around with the wifi hub turing off extas, flipping from "Auto" to a specific Number (1 to 13) and turning on (OR OFF!) Mixed B/G to just B OR G... very strange... and random.
The only things I've changed recently are, upgraded to snow leopard (from leopard) and got an external display. But I cannot say if the incidents coincided or not, as I didn't realise the sleep/wake issue was an issue for a while, as the first few times I just thougth "Oh, something weirds happened... Reset..." and didnt' really think too much about it until it happened for the 3rd or 4th time and I could see there was a pattern...
The external monitor via minidisplay port adaptor i got from teh apple store.
I don't use it with the machine closed or external keyboard/mouse, although I've heard you can do this, I use the monitor as a secondary display when I'm at the desk, the rest of the time I just use it as I have always done.
I would love to see a solution to this, I guess I could try warranty, but I dunno if the issue is warranty "level"...?
Message was edited by: smerlon
Message was edited by: smerlon