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Troubleshoot PC Screen Problems
Almost everybody sees an occasional problem with how their PC screen appears – a flicker here, a bit of snow or temporary distortion there. As video changes modes of operation, it's not unusual to see something odd. The question is how long the problem lasts. If it's instantly over, there is usually no cause for concern unless it quickly repeats. If the problem instead seems to deepen or worsen over time (and you shouldn't allow this to go on indefinitely), you need to check this out.