Thanks for the detailed tips.
I have to visually check the sync-ness of the two LEDs. I will stare at them for at least 10 minutes and see whether they are in sync.
Let me get hold of my Fluke, and I'll report back my progress.
Thanks again, Phil Wong
At 09:42 AM 6/3/2004, you wrote:
PhilPhil,
1 Check LEDS DS7 and DS8 on the logic board. In a working unit, these LEDs should be in sync with each other: both on or both off. If one LED is on and the other is off, there is a problem. 2 Verify the power outlet is good. Try a known-good power cord. 3 Make sure the voltage switch on the back of the power supply is set to the correct voltage. 4 Check for +5V trickle voltage on pin 20 at the power supply connector, J23. (Pin 20 is the pin closest to the edge of the logic board and the front of the computer.) If there is a +5V reading, you know the power supply is likely OK. However, if there's no +5V trickle power, replace the power supply. 5 Disconnect the keyboard and power-on the system via the reset button on the front of the computer. If the unit powers on, replace the USB keyboard. If not, go to next step.
BBoppie
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