My DV2210US notebook (3yr old) suddenly froze-up with a grey screen with multiple "n" across the entire screen. It would not shut off until I removed the battery and now there is no display, no LED's just the cooling fan runs continuous. I replaced the battery and tested the hard drive which checked out OK.
Since the unit doesn't even light up, you should contact support and arrange for a repair: 800-474-6836.
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