Blue Screen For Five Minutes at Start Up

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Level 1

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Blue Screen For Five Minutes at Start Up

After upgrading from Tiger to Snow Leopard, I have a five minute blue screen whenever I start up the computer. If I start up in Safe Mode the blue screen does not come up.

I've tried:

re-installing Snow Leopard
resetting SMC
resetting PRAM/NVRAM
checking for incompatible login items (none)
ran the Apple Hardward Test (no problems found)

Despite doing this, the blue screen reappears when I start up the computer

Any thoughts? Thanks.

Intel MacBook late 2007, Mac OS X (10.4.11)

Posted on Jan 12, 2010 10:39 AM

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Answer 1

R C-R

Level 6

17,782 points

Jan 12, 2010 2:59 PM in response to Aaron42

You don't mention running Disk Utility's two tests (Verify Disk & Repair Disk Permissions). Both are worth doing for this issue.

Also, check /Library/StartupItems & /System/Library/StartupItems. Both are normally empty. Anything in them might slow startup.

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Answer 2

Aaron42 Author

Level 1

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Jan 13, 2010 10:51 AM in response to Aaron42

Yes, I used the repairing permissions function in Disk Utility. No change. I also looked at the libraries that you suggested. Both files were empty.

I am at a loss.

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Answer 3

R C-R

Level 6

17,782 points

Jan 15, 2010 2:05 AM in response to Aaron42

Did you run Disk Utility's *Verify Disk* function? This is an important test & completely different from the permissions repair step.

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Answer 4

Jan 15, 2010 3:45 AM in response to Aaron42

That problem usually comes with a IOKit timeout due to a device driver problem. Please use the Console application to inspect the logs and try to locate the IOKit timeout message. Then post the message with a bit of context here and I will look into it.

Cheers,

Jazz

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