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<blockquote data-quote="MacHeadCase" data-source="post: 408528">Can you pop in the optical drive Apple's Hardware Test that came with your Mac? It's either on its own CD (older Macs had the diagnostic tool on its own CD) or it is on one of your install CD disks.Restart and hold down the C key and when prompted, ask for the Extended Test. This will check all ports, video card, RAM, etc.Report back with the results. This is to make sure this isn't a hardware test.Also what you might do is create a new user account, log into that new one and see if the problems persist in the new account. If all seems to work in there, it means that there is software in your old user account that is corrupted or causing some type of conflict. If the problems still happen in the new account, it means the conflict is system-wide.To help us further, can you recall when this started to happen? Was this right after some software install? Or did you change anything in the system or your account? Did you add any peripherals shortly before?</blockquote>

[QUOTE="MacHeadCase, post: 408528"] Can you pop in the optical drive Apple's Hardware Test that came with your Mac? It's either on its own CD (older Macs had the diagnostic tool on its own CD) or it is on one of your install CD disks. Restart and hold down the [I]C[/I] key and when prompted, ask for the Extended Test. This will check all ports, video card, RAM, etc. Report back with the results. This is to make sure this isn't a hardware test. Also what you might do is create a new user account, log into that new one and see if the problems persist in the new account. If all seems to work in there, it means that there is software in your old user account that is corrupted or causing some type of conflict. If the problems still happen in the new account, it means the conflict is system-wide. To help us further, can you recall when this started to happen? Was this right after some software install? Or did you change anything in the system or your account? Did you add any peripherals shortly before? [/QUOTE]

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