What wire lights up the monitor on a PC

Sometimes when I am using my computer, the monitor darkens. Sound and internet seem to be on, b ut the monitor is dark. If I kick the wires underneath the desk, it comes back on. What is the problem?
2 answers Last reply
More about what wire lights monitor
  1. vga or dvi cable is loose. its the only cable that goes from the computer to the monitor.
  2. It is probably faulty power strip. Each individual outlet has its own use. Buy a new one from Tom's Hdwe.
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