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imac late 09 27" startup/sleep mode problem

F

flyinhigh

macrumors member
Original poster
Jul 31, 2008
49
0
Hi, this morning while on my imac the screen went straight to black, like it went in to sleep mode but I was active at the time. Couldn't bring it out of sleep. Then couldn't shut it down. Only thing I could do was power off. When I go to start up I get the white screen for few seconds then it goes to black (no start up sounds, no green camera light) Only way that I can tell if it is off or on is by putting my ear to it. Holding down the button I can hear that it shuts down. But when I startup I get the white screen to black no startup sounds. Sometimes when I hold the start button gently I get a few seconds flash of my home screen. I've tried the trouble shooting for 'freezes' and for 'won't turn on or startup' from the manual. No luck. Anyone got any clues to what's going on, how I can fix it? (Staying calm but worried):(
Imac 27", late 2009, running Mavericks.
 
Well, you could try resetting the SMC:

Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.

If this doesn't help then it is probably a hardware problem, an mentioned, possibly the Logic board. Needs professional diagnostics.
 
macthefork said:
Well, you could try resetting the SMC:

Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.

If this doesn't help then it is probably a hardware problem, an mentioned, possibly the Logic board. Needs professional diagnostics.
Click to expand...

Thanks, no luck. Few other things to try/look at before off to the $$$shop. advice appreciated.

----------
macthefork said:
Based on what you've said in your other thread...

https://forums.macrumors.com/threads/1697782/

It could also be a failed HDD. Those iMac's had a recall on the Seagate Hdd based on iMac's S/N. The Apple site for this is here. However, this program has expired. Yet, you still could call them if your iMac shows on their site and see what they say.
Click to expand...

Thanks, will add it to the list of things to look at today. Much appreciated. One thing is, I'll learn a few things out of this. (..but much rather have it running!)
 
macthefork said:
It could also be a failed HDD. Those iMac's had a recall on the Seagate Hdd based on iMac's S/N. The Apple site for this is here. However, this program has expired. Yet, you still could call them if your iMac shows on their site and see what they say.
Click to expand...

Thanks. Checked the site. Entered my serial no., got this response: "The iMac serial number you entered is not eligible for this program. No further action on your part is needed at this time." Presuming this mean mine not one with a faulty seagate HDD installed.
 
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