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| Identifying Power Adapter Problems in Your Laptop |
Say that you plug your laptop into a wall socket you press the On button, but the lights don't flash, the screen doesn't change colors, and the earth doesn't move. The power doesn't be. To identify the problem, you need to understand the nitty gritty of the electrical system. Nearly every laptop uses DC (direct current) voltage, usually in the range of 5 to 20 volts; almost nowhere in the world, outside of a laboratory, does that type and level of power come out of a wall outlet. Instead, when you connect a laptop to wall current, you use a power cord that includes a small box that converts AC (alternating current) of 110 volts (in the United States, Canada, and a few other places around the world) or 220 volts (the standard AC voltage in most of the rest of the world). Identifying Power Adapter Problems in Your Laptop : Yahoo! Tech Linked by LT Hacker
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