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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

iMac - screen randomly goes black


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angelo9888

 
Member Since: Aug 02, 2009
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hello again
there is one more problem with my imac! **** this thing it has like 1 million problems!
anyways the problem goes like this: the screen randomly goes black... i m just like chatting or i m on firefox and suddenly the screen goes black... no sound nothing just a black screen and i have to shut it down and then it works fine again...
anyways i went to the console messages and got these lines when the screen went black


8/3/09 2:01:20 PM [0x0-0x17017].org.videolan.vlc[157] [0x280338] main interface error: no interface module matched "globalhotkeys,none"
8/3/09 2:01:20 PM [0x0-0x17017].org.videolan.vlc[157] [0x280338] main interface error: no suitable interface module
8/3/09 2:01:20 PM [0x0-0x17017].org.videolan.vlc[157] [0x201768] main libvlc error: interface "globalhotkeys,none" initialization failed
8/3/09 2:01:20 PM [0x0-0x17017].org.videolan.vlc[157] [0x201768] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
8/3/09 2:01:22 PM [0x0-0x17017].org.videolan.vlc[157] Interface initialization failed
8/3/09 2:01:22 PM com.apple.launchd[70] ([0x0-0x17017].org.videolan.vlc[157]) Exited with exit code: 1
8/3/09 2:01:32 PM [0x0-0x18018].org.mozilla.firefox[159] Debugger() was called!
8/3/09 2:01:55 PM [0x0-0x18018].org.mozilla.firefox[159] Debugger() was called!

and thanks....
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Kevriano

 
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Have you run Disk Uitilty and verified permissions and the HD?
If not, you should, but run it from the install disc.
If you don't have them try the fsck command. If you search here you'll find a "how to" about that.

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angelo9888

 
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thanks for the help mate...
i just did it...
but how is this going to help me with the black screen thing?? (i m asking in the best possible way)
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Kevriano

 
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Well verifying permissions etc and the HD may turn up some problems with the OS that Disk Utility can fix.
FSCK will almost certainly fix it if it's an OS problm, but this is a process of elimination, it could be a video card problem, or a loose connection to the screen, but start with software and then do hardware is my way of looking at it.
Did Disk Utility come up with any errors?
Do you have a Hardware test disc?

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angelo9888

 
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yeah i did both permission and disk check... the disk was ok although i had permission problems... but the thing is that i just had a clean install yesterday... i really hope that this fixed my problem... and thank you very much for the help...

and i have this problem as well

http://www.mac-forums.com/forums/app...m-problem.html

take a look at it if it doesn't bother you, although i restarted the nvram and it seems that this solved it... not sure though....
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Kevriano

 
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How old is your iMac? It can't be that old being an Aluminium model. Is it still in warranty?
I read the other thread and that's quite unusual and worrying, and certainly not right.
I would definitely run a hardware check now, just to see if it throws anything up, but it may be a power supply problem.

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angelo9888

 
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it is like 2 years old...
and the warranty was just for one year
and yes that was what i suspected.. do you think it is the power cable or something from the inside?
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angelo9888

 
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the thing is that i have only one installation disk which i think is the upgrade disk or something... so when i restart my mac and press the d button nothing happens...
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pigoo3

 
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Quote:
Originally Posted by angelo9888 View Post
the thing is that i have only one installation disk which i think is the upgrade disk or something... so when i restart my mac and press the d button nothing happens...
That's as it should be...pressing the "d" button will do nothing...you're supposed to hold down the "c" button if you want it to boot from the CD/DVD drive. Assuming your iMac will boot or can boot from this CD/DVD!

- Nick
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Kevriano

 
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Quote:
Originally Posted by pigoo3 View Post
You're supposed to hold down the "c" button if you want it to boot from the CD/DVD drive...assuming your iMac will boot from this CD/DVD!

- Nick
Not for the Hardware test, Angelo was right, and then it appears you don't have the right disc.
What OS are you running?

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angelo9888

 
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10.5.7 the installation disk is 10.5 though....
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pigoo3

 
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Quote:
Originally Posted by Kevriano View Post
Not for the Hardware test, Angelo was right, and then it appears you don't have the right disc.
What OS are you running?
Angelo mentioned having an "installation" disk...that as nothing to to with the hardware test...so holding down the "d" key will not help when trying to boot from an installation disk.

- Nick
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Kevriano

 
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pigoo3:

Intel-based Macs: Using Apple Hardware Test

Angelo, you need to read that too, just to check. If you have a generic leopard disc (dvd) you won't have the Hardware test built in.

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angelo9888

 
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yeah that's what i got... so what do i do now????
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pigoo3

 
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Quote:
Originally Posted by Kevriano View Post
pigoo3:

Intel-based Macs: Using Apple Hardware Test

Angelo, you need to read that too, just to check. If you have a generic leopard disc (dvd) you won't have the Hardware test built in.
Thanks for the info...but as I mentioned previously, "Angelo" never said anything about running the hardware test...but I do agree that running the hardware test would be a good thing to try.

Angelo also mentioned in the link to another thread that the computer is a 20" Aluminum 2.0 ghz iMac. The computer shipped with Mac OS 10.4.10.

Angelo also mentioned in this thread that the installation disk is OS 10.5. So my guess is the disk does NOT have the hardware test, or it's not a disk that came with the computer...so it may not even be a compatible disk for the computer.

So all this talk about hardware test is just a waste of time!

- Nick
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