I have an aluminum MacBook with Lion OS. I have hooked up a Samsung external HD monitor, but the image is slightly blurry.I also see a message for a second which says Analog.What to do??

I have an aluminium MacBook and have just connected an external Samsung HD monitor. The image is blurry and I cannot seem to fix it.
The MacBook display is 1280x800 but the maximum for the external monitor is much higher. Also the external monitor sometimes displays a (rapid) message implying that it's getting an Analog signal.
How can I fix this??

FWIW, reformatting a USB disk is almost never an issue, and it's quick.
Buy a cheap external USB disk (regardless of the provided Windows or OS X or other disk format) (that's larger than your internal disk by some measure) and preferably buy a disk from a vendor that offers the right to return the disk if it doesn't work, connect the disk to your MacBook, wipe the disk and reformat it with Disk Utility, perform the backup (probably also using Disk Utility from the Utilities menu, while your MacBook is booted from the installation DVD), and then commence with the OS X upgrade.

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I have an aluminum MacBook with Lion OS. I have hooked up a Samsung external HD monitor, but the image is slightly blurry.I also see a message for a second which says Analog.What to do??

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