Or buy a multimeter at any electronics store (some cost less than $10) and test the AC adapter with that. Click for an excellent tutorial on using one of these hand-held testing devices. If you're in a hurry, you can scroll down to "Example 2: Testing wall wart (adapter) plugs."

If your adapter tests fine, the problem is beyond most users' capabilities. I recommend taking the laptop to a professional, preferably one certified by the manufacturer.

Read the original forum post at http://forums.pcworld.com/message/216177.

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