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No software tweak or hardware repair can make a disconnected laptop magically power on.

This is a major reason a computer may not even start. It sounds silly, but you need to make sure the laptop is actually plugged in. Are You Plugged In? (Photo: Danicek/Shutterstock) By taking an inside-out approach, you can quickly narrow down where the problem originates and find the most economical solution. Knowing which is which can save you hours of frustration and hundreds of dollars in repairs. Some are easy to fix yourself with a software tweak or a new battery, but other problems may require a visit to a repair shop, or even a full-blown system replacement. There are numerous ways to take care of your battery, but between the wall outlet and your computer there are several things that can fail.