We all know AVR (Automatic Voltage Regulator) is prone to breakdown; the hardest part is when you confront it in the middle of your work. Such failure may be due to damage parts or just simply a connection problem with the power supply line.  The first thing that comes to our mind is to call for a technician for repair or go to a computer shop to buy a new one, this is a good step, but we can also try to apply a first hand troubleshooting.

Instructions:

1.       Check the monitor and the CPU power.  Usually a power led indicates if the monitor and CPU have power.   If one unit is powered, it indicates that the AVR is still functioning.

2.       Check the connection between the units and AVR. If either the monitor or the CPU is powered, the AVR still supplying power and the problem can come from loose connection between the AVR and the no powered unit. The trouble can also come in the AVR damage sockets or the unit?s worn power plugs.       

3.       Check the AVR led.  If both the monitor and the CPU are off but the AVR led is on, it indicates that the AVR still enables to get the power but cannot channel the power to the unit. The problem comes from the AVR parts which are better to change the whole AVR unit than to repair.

4.       Check the connection between the AVR and the main power supply line. If both units are not powered and the AVR led is off, the problem can be caused by a loose connection in the power line or the AVR wire and plug are damage.

5.       Plug the AVR in a different power outlet. If you think the AVR is still in a good state, try to plug it in another outlet and see if the AVR led will turn on. If the AVR led is on the problem can be caused in the connection from previous power supply line.