The Duo Dock manual from Service Source suggests measuring the voltages for pins 5 and 7 on the power supply-to-logic board cable. They should fall between the following ranges:
• Pin 5 (yellow wire) 5V + or - .5V
• Pin 7 (blue wire) 20V + or - .5V
If voltages don’t fall within the above ranges, replace the power supply.
For more info see:
• Pin 5 (yellow wire) 5V + or - .5V
• Pin 7 (blue wire) 20V + or - .5V
If voltages don’t fall within the above ranges, replace the power supply.
For more info see: