External drive boot problem

I have a Verbatim USB external drive plugged into my iMac used for backups with time machine.  When I start the computer it immediately stops at a blank white screen.  If I turn the computer off and unplug the external drive and restart it works fine.  Is there anyway to make the computer boot with the external drive plugged in?

Open Sys preferences then Startup disk and select your internal drive and click Restart then again restart from the drop down that Drops Down.
Once you have done that and the system restarts shut it down and connect the external then start it back up. It should now go to the internal drive automatically.
If it doesn't then you have some other problem which may be a hardware problem. Post back with your results.

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    So,
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    drayman86 is online now Report Post Edit/Delete Message

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    Dumb question —
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