“Technical issues during a hardware launch are nothing new, but with a machine as delicate as PSP, reports of problems are more rampant. The most common complaint is a “dead pixel,” which appears ona screen in a variety of forms (red, blue, green, white spots, dark spots). Jump on any message board and you’ll find posts littered with personal accounts of anywhere from one to 25 or more deadpixels appearing on brand-new PSPs.
SCEA doesn’t deny PSP machines may encounter these issues, but doesn’t see it as a problem. “As with any LCD product on the market, a very small number of dark pixels or continuously lit pixels is normal for LCD screens, and is not a sign of a malfunction.” says Patrick Seybold, a Sony Computer Entertainment America (SCEA) representative. A similar description also appears in the PSP’s user manual. What defines a small number, however, isn’t known, and SCEA had not responded to our requests for clarification as of press time. “
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Found VIA ExtremeTech