In the video below, you can see the workflow in the lab of Hewlett Packard. Laptops have thousands of cycles of opening and closing the lid, remove the optical drive tray, and even beat the 10,000 volts of static electricity.
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Check out HP's John Vijil performing a 15,000-volt electrostatic shock test on HP Elite PCs -- just one of the reliability tests that HP PCs undergo before showing up on store shelves.