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I'd go exchange the power supply for the correct one (check the voltage, polarity and mA rating that's marked next to the power input). It may be too late, though.
There will be a fuse on the internal power input board, as well as one in the power supply, but if the instrument is turning on and lighting up, it's not a blown fuse.
power supply if only the light comes on---basic is follow power cord inside and see if any bad fuses or puffed up caps in power supply but beyond that need a meter to test things and be able to trouble shoot.
The following troubleshooting guidelines are basic troubleshooting steps.
It is recommended to charge the battery while the system is off for
faster charge times. Users may notice longer charge times when the
system is powered on and running graphics extensive applications.
If the system does not perform a Power On Self Test, there are various things to look for:
If the system has no power light, ensure that it is plugged into AC power. Remove the
If the system has power but is not performing a POST, check to see
if the keyboard status lights flash to indicate a successful POST, but
no video, or that the keyboard status lights are lit in a sequence
indicating a system problem.
With the power off and the system unplugged, remove all CRUs from the system and reconnect that AC adapter to
the system and try again.
Run the On Board Diagnostics (OBD).
If the LCD on the system shows no display, or has other LCD problems, there are some basic steps to take:
If the LCD is not displaying video or the video is garbled, run the BIST Test.
If the LCD is not displaying any video, connect an external monitor to eliminate a no POST problem. A good
image on the external monitor eliminates a video card problem or a POST problem.
Connect an external monitor when possible for all LCD related problems, to help eliminate
a software possibility or video card problem.
If the LCD has extremely dim video, attempt to adjust the brightness
or connect an AC adapter to eliminate a power management conservation setting set in the BIOS.
If the LCD has lines on the screen, check the system during POST as well as system setup to
verify if the lines are present in all modes of operation. Run the BIST Utility.
start simple, use the process of elimination
cord connection to the console
is there an internal fuse setup in the Wii
even though the power light is not on, did you try the console anyway;meaning the power on light may have failed
Make sure all the doors and covers are closed. If nothing happens and the FAN does not run then there are 2 fuses FU101 and FU202 on the DC controller board. Also check that rthe scanner assembly is correctly seated on the DCA Controller board.