• LED 1 indicates that trickle voltage from the power supply has been detected. This LED will be ON when the computer is turned off and your power supply is working correctly.
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'''• LED 1''' indicates that trickle voltage from the power supply has been detected. This LED will be ON when the computer is turned off and your power supply is working correctly.
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• LED 2 indicates that the main logic board has detected proper power from the power supply when the computer is turned on. This LED will be ON when the computer is turned on and the power supply is working correctly.
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'''• LED 2''' indicates that the main logic board has detected proper power from the power supply when the computer is turned on. This LED will be ON when the computer is turned on and the power supply is working correctly.
-
• LED 3 indicates that the computer and the LCD display are communicating. This LED will be ON when the computer is turned on and video signal is being generated.
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'''• LED 3''' indicates that the computer and the LCD display are communicating. This LED will be ON when the computer is turned on and video signal is being generated.
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• LED 4 lights only if the computer detects an over-temperature condition. This LED will be OFF when the computer is turned on and running at the correct temperature.
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'''• LED 4''' lights only if the computer detects an over-temperature condition. This LED will be OFF when the computer is turned on and running at the correct temperature.
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Assuming I am reading the manual correctly, If LED1 is ON then the PSU is at least powering up to some degree. Check [http://www.xlr8yourmac.com/images/imacg5_power_supply_pinout.gif|THIS PINOUT] guide or [http://jimwarholic.com/2010/03/measuring-imac-g5-power-supply-voltages-at-connector-plug-pinouts.php|THIS ARTICLE] and see if the other voltages are present. Note the istructions to power ON the PSU while not connected. [http://jimwarholic.com/2009/04/apple-imac-g5-power-supplies-capacitors.php|THIS ARTICLE] may also be of interest
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Assuming I am reading the manual correctly, If LED1 is ON then the PSU is at least powering up to some degree. Check [http://www.xlr8yourmac.com/images/imacg5_power_supply_pinout.gif|THIS PINOUT] guide or [http://jimwarholic.com/2010/03/measuring-imac-g5-power-supply-voltages-at-connector-plug-pinouts.php|THIS ARTICLE] and see if the other voltages are present. Note the instructions to '''power ON the PSU''' while not connected. [http://jimwarholic.com/2009/04/apple-imac-g5-power-supplies-capacitors.php|THIS ARTICLE] may also be of interest
• LED 1 indicates that trickle voltage from the power supply has been detected. This LED will be ON when the computer is turned off and your power supply is working correctly.
• LED 2 indicates that the main logic board has detected proper power from the power supply when the computer is turned on. This LED will be ON when the computer is turned on and the power supply is working correctly.
• LED 3 indicates that the computer and the LCD display are communicating. This LED will be ON when the computer is turned on and video signal is being generated.
• LED 4 lights only if the computer detects an over-temperature condition. This LED will be OFF when the computer is turned on and running at the correct temperature.
-
Assuming I am reading the manual correctly, If LED1 is ON then the PSU is at least powering up to some degree. Check [http://www.xlr8yourmac.com/images/imacg5_power_supply_pinout.gif|THIS PINOUT] guide or[http://jimwarholic.com/2010/03/measuring-imac-g5-power-supply-voltages-at-connector-plug-pinouts.php|THIS ARTICLE] and see if the other voltages are present. Note the istructions to power ON the PSU while not connected. [http://jimwarholic.com/2009/04/apple-imac-g5-power-supplies-capacitors.php|THIS ARTICLE] may also be of interest
+
Assuming I am reading the manual correctly, If LED1 is ON then the PSU is at least powering up to some degree. Check [http://www.xlr8yourmac.com/images/imacg5_power_supply_pinout.gif|THIS PINOUT] guide or [http://jimwarholic.com/2010/03/measuring-imac-g5-power-supply-voltages-at-connector-plug-pinouts.php|THIS ARTICLE] and see if the other voltages are present. Note the istructions to power ON the PSU while not connected. [http://jimwarholic.com/2009/04/apple-imac-g5-power-supplies-capacitors.php|THIS ARTICLE] may also be of interest
'''From the G5 17" (non iSight) manual'''
• LED 1 indicates that trickle voltage from the power supply has been detected. This LED will be ON when the computer is turned off and your power supply is working correctly.
• LED 2 indicates that the main logic board has detected proper power from the power supply when the computer is turned on. This LED will be ON when the computer is turned on and the power supply is working correctly.
• LED 3 indicates that the computer and the LCD display are communicating. This LED will be ON when the computer is turned on and video signal is being generated.
• LED 4 lights only if the computer detects an over-temperature condition. This LED will be OFF when the computer is turned on and running at the correct temperature.
Assuming I am reading the manual correctly, If LED1 is ON then the PSU is at least powering up to some degree. Check [http://www.xlr8yourmac.com/images/imacg5_power_supply_pinout.gif|THIS PINOUT] guide or[http://jimwarholic.com/2010/03/measuring-imac-g5-power-supply-voltages-at-connector-plug-pinouts.php|THIS ARTICLE] and see if the other voltages are present. Note the istructions to power ON the PSU while not connected. [http://jimwarholic.com/2009/04/apple-imac-g5-power-supplies-capacitors.php|THIS ARTICLE] may also be of interest