help computer wont start

[ticat_01]

my computer wont start? when i turn the power on it starts loading for around 3 sec's then just restarts again and it keeps going over and over again    i cant see anything on the screen it just says plez check singal cable  it dose in both screens i checked and there fine   so is the computer done or what? lol

[patio]

We can't see anything on your screen either....nor can we see the machine.
More info...

[iamyourmom]

Well, since you say the machine restarts over and over again. i have reason to believe that the CPU is overheating. open up the computer and check if the CPU heatsink is loose or not functioning.