Having problems with your Dell Latitude C640 Notebook ?
Laptop screen won't turn back on after lid was closed
Sometimes turning the unit off doesn't always work. Disconnect battery and then retry As soon as the screen comes on hit the control button and F10 should put you into a safe mode. If it does not work then you will need to get a new hard drive that you might have gotten a WORM ATTACK OR VIRUS THAT TERMINALLY CRASHED YOUR UNIT.
Repair Help & Product Troubleshooting for Dell Latitude C640 Notebook
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