My projector no longer recognizes my mac. It always worked before, but last week, it would not detect a signal. what has changed?

I have been doing powerpoint presentations for 3 years. No problem. Last week, the projector did not recognize any signal coming from my Macbook. It recognizes two other Macbooks, so I don't think it's an issue with the cable. I'm guessing something has changed on my settings, but I have no idea what!!!!

Thanks for the response, and sorry for the delay on my end. This seemed to resolve my problem as well. I had no idea about a device manager. To find it, Right click My Computer, then click Manage, then find and click Device Manager under System Tools. In my case, my computer recognized the devices and the drivers, but still indicated a problem. So I finally uninstalled the devices (Right click / Uninstall), then installed them again. The X-Fi did not software for this. For my Micro, I used the original CD. I believe this all of the drivers and software are on the Creative site as well. I still have no idea what happened, but everything works and I am satisfied. Thanks for the lead.

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L2 Cache (per core):          256 KB
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SMC Version (system):          1.58f17
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Hardware UUID:          *****
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<Edited By Host>

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My projector no longer recognizes my mac. It always worked before, but last week, it would not detect a signal. what has changed?

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