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Apple emac ati usb2 2005 Service Manual

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eMac ATI Graphics /USB 2.0/2005  Troubleshooting - 37
No Power Symptom Charts
Random Shut Down
While using the computer it just shuts down for no reason.
1.
Check the jumper settings, make sure they are set correctly. Refer to the “Digital/Analog Voltage Setting 
and LHR Module Instructions” mentioned earlier in this chapter. Note: There is one jumper for the 
voltage and one jumper for the LHR coil. Both jumpers should be installed when the computer is 
operating in the 110V environment. If the jumpers are set correctly, go on to the next step.
                                                         Voltage Jumper Location
                                                       LHR Coil Jumper Location
2.
Check the power button. Attach a known good power button to the unit and test. If you can’t reproduce 
the random shut down symptom, replace the power button.