Asus P4sgx-mx

Issue: No power or computer does not turn on.
Cause: No power from the computer can be caused by any of the below possibilities.

1. Connections not connected properly.
2. Third-party hardware.
3. Bad power cable.
4. Incorrect power supply.
5. Bad battery.
6. Bad power supply, power button, and/or power board or inverter.

Solution: Note: If the computer is turning on but is not (beeping) or giving any type of picture on the display. If you are uncertain if the computer is turning on or not, this can be easily checked by locating any fans in the computer or visible from the outside of the computer. If these fans are spinning, the computer is receiving power and this document may not apply to your issue. Connections not connected properly Verify that the power connection is connected properly to the wall and the back of the computer. If the connections appear to be connected properly, attempt to disconnect and reconnection both ends of the cable. If you have a power strip (surge protector) or switch used to turn everything on at once, temporarily disconnect the computer from that switch and connect that cable directly to the wall. This will help verify that the strip or switch is not bad. Verify that the outlet works by connecting a different component to that switch. Third-party hardware : (If )additional hardware has been recently added to the computer it is recommend that you temporarily disconnect that device or devices from the computer to verify they are not preventing your computer from turning on. Bad Power cable : Verify that the cable supplying your computer is not bad or damaged by using another power cable. If you have a standard crt modem this cable can be used in place of the computer power cable. If you have a portable computer or laptop, when the cables are plugged into the laptop you should see a power light or battery charge light. If this light is seen, this is a good indication that the power cable is good. Incorrect power supply If you are building your own computer or if the computer has never turned on since you purchased it, it is possible you are using a power supply that does not supply enough power and/or the incorrect type of power supply. Verify your power supply meets the requirements of your motherboard and processor. Bad battery If your computer is a laptop or portable computer that utilizes a battery for mobility it is possible that the battery may be causing your issue.

• If your computer powers on when the cable is connected to the portable computer but not when it is disconnected, we recommend you purchase a new battery.
• If your computer does not power on when the battery is connected and when the power cable / charger cable is connected, try removing the battery and seeing if the computer can power on with only the power cable connected. If no power is still received, skip to the final section.

Bad Power Supply, power button, and/or power board or inverter If, after following the above sections, your computer still receives no power, it is likely that a hardware component in the computer has failed. It is most likely that the power supply has failed. If you do not plan on replacing the power supply yourself or if you have a portable computer, we recommend having the computer serviced by your computer manufacturer or a local computer repair shop. If you have a desktop computer and plan on trying to repair the computer yourself, we recommend you replace the components in your computer in the below order.

1. First open the computer and verify the power connections. You may also wish to consider disconnecting the main power cable and reconnecting the power cable to make sure it has not become loose. Also verify the power button cable is correctly connected to the Motherboard.
2. Replace the power supply with a new power supply.
3. Replace the motherboard.

Hope this helps ya/Please dont for get to Vote.Thank You

Could be the power supply. Do you have a way of testing it?

If not some computer shops can do it for you.

The easyest way that I have found to check the power switch is to trace it to the motherboard and disconnect it. Then with a small flathead screw driver you can make the connection between the two pins that the power switch was connected to. If the computer comes on then you know the problem is the power switch. If the computer dose not come on then you can forget about the power switch being the problem.

were does the power switch lead go on the mother board on a rev1.1

If I am not mistaken, the green light stays on as long as the computer is plugged into 110v power source so that means very little. I would first check power button and wires from power button to mother board. But as with all computer problems it could be a lot of other things. Process of elimination.

check to see if the power supply fan comes on when the power button is press if not you will have to open the pc and test the power connectors with a digital volt meter to see if you get the right voltage 5V (make sure to place your meter on direct current) or you can get a known good power supply and do a test. If you get the same problem the issue isn't the power supply. It can be an onboard device the next step is to remove all onboard device (memory,pci card, disconnect all drives etc)one by one as you move each device turn on the system. One off the device could be holding the system from starting. If you move all devices from the system while trying to turn on the system after each device is move and the problem still exsist you have a bad mother board and it needs to be replace