The first thing to establish is whether you have power available to your PC. This principle applies to any item electronic or electrical equipment, not just computers, and in this case is easily established by observation.
Are the LEDs (lights) on the system case lit and is the power supply fan blowing? If the answer to any of these questions is yes, then the systems power supply is operational. If there is no power at the wall socket, then plug another appliance into it. If you are using a surge suppressor or some similar device then try removing or by passing it and see if that cures the problem.
Check the PC`s power cable. If it is not working try substituting it with your electric kettle cable, these are usually the same type. Most PC`s also have an on/off switch at the rear of the case. Check whether it is in the off position. If all these solutions cannot cure your computer then you need to look for any defective capacitors, etc, or replace the systems power supply.
However, if the power supply is functioning, then you may have one of the three potential problems. Monitor, motherboard or the graphics system may be defective.
The first and easiest of these possibilities to rule out is the monitor. Firstly, look to see if the monitor`s power light is on. Check the main`s supply and also the fuse in the mains lead plug.
Many new monitors automatically initially display a message or splash screen of some sort when switched on, to show they are working. If it then you can easily tell if the monitor is faulty or not. A common cause of a seemingly deceased monitor is a Windows application called Advanced Power Management (APM).
This allows the user to set time, after which specific parts of the computer are replaced in standby mode. In the case of a monitor this has the effect of blanking the screen. In theory a slight movement of the mouse will bring the monitor back to life but it doesn't always work like that. Some times it can take a considerable amount of mouse clicking and key bashing to get the monitor back again.
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Advanced power management is a windows application that can cause a monitor to appear to be dead. Monitors carry high voltages which can be lethal. These voltages will remain until discharged; make sure they aren't discharged through you.
