First check the computer's power cord to make sure it is completely plugged into the wall socket. If you are using a plug strip, make sure it is completely plugged into the wall socket and that the power switch on the plug strip is turned on.
Some plug strips also have a built-in circuit breaker which usually looks like a black or red button near the power switch. Press the button to reset it and see if that solves the problem.
Alternatively try powering it from a different power point to eliminate the possibility of a tripped circuit or faulty outlet.
If you are still experiencing issues contact us on 07 4080 2000.