Hey Kozman,
checked the battery and it has 2.95v
Hmm mine all read above 3.0 Volts usually 3.09 V.
i tested the power supply and it checked out.
How did you test the supply?
Did you reset the SMU? (from the Service Source)
"The SMU supports the following functions
:
• provides initial configuration of system clocks
• automatically initiates and sequences voltage and frequency slews when the OS
requests a transition to a new run level
• handles all power button and environmental user events
• controls RPM fans
• provides processor Mode Ring and thermal data store
• monitors processor temperature and power consumption
• monitors VRD10-compliant processor power supply digital interface.
The iMac G5 system employs advanced thermal and wattage management to keep
acoustic noise to a minimum. The enclosure is divided into discrete zones, each with
independently controlled fans bringing in cool air from the front of the enclosure, directing
it over system components and exhausting it out the rear. Temperature and power
consumption are monitored by the operating system which communicates with the SMU,
which in turn controls and monitors fan operation. If Mac OS X is not booted, thermal
management must be provided by the alternate development operating system.
Note:
If Mac OS X is not booted and the alternate development operating system does not
manage the fans, the fans go into an unmanaged state and run at full speed.
The SMU controls the fans and regulates the speeds to run each fan. The SMU derives
fan speed from sensors in each thermal zone. Some of these sensors monitor thermal
only, while others monitor both thermal and power.
If the SMU does not receive an update from the operating system within two minutes, it
begins to ramp up the speed of the fans to full speed.
Resetting the SMU (System Management Unit)
1. Unplug all cables from the computer, including the power cord.
2. Wait 10 seconds.
3. Plug in the power cord while simultaneously pressing and holding the power button on
the back of the computer.
4. Let go of the power button.
5. Press the power button once more to start up your iMac G5."
Here's the part about the LEDs,
"•
LED 1
indicates that the trickle voltage from the power supply has been detected
by the main logic board. This LED will remain ON whenever the iMac G5 is
connected to a working AC power source. The LED will remain on even when the
computer has been shut down or put to sleep. The LED will turn off only if the AC
power source is disconnected or the power supply is faulty.
•
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."
Richard
