Why display screen is always to the left! ! !

Users questions: My monitor always has recently shifted to the left image, the display is to buy the flat in 2001, and every few hours, then re-boot, the screen is always very far to the right side, always stressed, is not where something wrong with the tubes
Experts answer: may be because the problem of aging lead to instability in the screen, there is significant The display and graphics card connected to the aging lines, virtual access and the like will happen, I think the other is unlikely to
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