Gateway mx6448 Notebook will not power on, Red LED flashes 4 times when power on button is pressed then nothing happens. It is the same with only the battery. LED will not flash if I have only the power adapter plug in (battery removed).

There can be many things associated with no power to the computer.

• The outlet into which the computer is plugged may be inoperative.


• The surge protector you are using may be inoperative.


• The power cable may be loose or damaged.


• An internal device may be damaged.


• The power supply may be inoperative.

1. Verify that the outlet into which you are plugging the computer is operational.


2. If you have the computer plugged into a surge protector, plug it directly into the outlet.


3. Verify that the power cable is plugged securely into the back of the computer.


4. If you have a monitor with a removable power cord, swap the power cords between the monitor and the computer.

• External Device Conflicts
There may be an external device causing the computer not to turn on properly.


1. Before continuing, verify your computer is turned off.


2. After you have established that adequate electricity is going to your computer, verify that the voltage switch on the back of the power supply is set correctly. The small red switch is to be set to the 115-volt setting.


3. Remove all external devices except the monitor and turn on the computer. If the fan on the back of the computer now spins, turn off the computer. Plug in the external devices one at a time and turn on the computer after each device is added.

Note: If you removed all external components and the fan on the back of the computer does not spin, the problem is with something inside the computer.


• Internal Device Conflicts
This helps determine if the issue is a damaged or badly seated component.


1. Verify that the computer is turned off.


2. Remove the case from the computer.


3. Remove all the red, yellow, and black power connectors from each floppy disk drive, CD-ROM drive, and tape backup unit that is in the computer. The only devices connected to the power supply are your hard disk drive and motherboard.


4. Turn on the computer and verify that the fan on the back of the computer spins. If it does not spin, turn off the computer.


5. Remove the power connection from the hard disk drive and reconnect power to one floppy disk drive. Turn on the computer and verify that the fan on the back of the computer spins.


6. Reseat the power connection from the power supply to the motherboard. Turn on the computer and verify that the fan on the back of the computer spins. If the power has been restored, turn off the computer and reconnect the power connections to the devices. Test the computer for power after reconnecting each device.


• Power Switch
The power switch may not be functioning properly.


1. You may need to open the case and readjust the power switch.


2. Locate the control panel inside the computer and remove any screws holding it in place.


3. Turn on the computer with the control panel removed by pressing the button on the control panel that corresponds to the power button. If the power supply fan spins and/or the computer turns on, put the control panel back in its place. Try to turn on the computer again.


• Test Switch and Diagnostic LED
  
Note: Not all power supplies have a test switch and diagnostic LED.
Certain power supplies have a test switch and LED to help better troubleshoot the device. The green LED is always on when the computer is powered on. If the computer is not receiving power please perform the diagnostic test below.


1. Verify that the computer is turned off.
   
2. Remove the case from the computer.
   
3. Remove all of the red, yellow, and black power connectors from each floppy disk drive and ROM drive and the tape backup unit (TBU) that is in the computer. Remove all power connectors from the motherboard. The only device that needs to be connected to the power supply is the hard disk drive.
   
4. Press and hold the test switch for five seconds on the power supply, and then verify that the green light on the power supply comes on.
   
5. If the light comes on:
   
   1. The power supply is good and something that was plugged into the power supply is causing the computer to not turn on.
   2. Plug devices in one at a time, testing with the test switch between each device to determine what is causing the power issue.
   3. If all devices are plugged in and the light is working, the connections may have needed to be reseated, or it is possibly a power switch issue.
   4. Go to the power switch section of the power supply checklist for additional troubleshooting steps.
   
   
6. If the light does not come on:
   
   1. Disconnect the power from the hard disk drive, and then plug in power to the CD-ROM drive and determine whether the light comes on.
   2. If it does, follow the preceding information - "If the light comes on."
   3. If the light still does not come on, contact Gateway Technical Support.
   
   
7. Confirm that power from the power supply is connected to the motherboard. Remove all cards and cables from the motherboard, and press and hold the test switch for five seconds on the power supply and determine whether the green light-emitting diode (LED) comes on.
   
8. If the LED comes on, put the devices back in one at a time, testing between each device to determine what is causing the issue.