x68000:soft_power_switch_troubleshooting_and_repair
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Soft power switch troubleshooting and repair
The following information is kind contribution by our forum members Lydux and Caius. This fix was applied to X68000 ExpertHD and SUPER.
The symptom: System powers on fine, but does not go into stand-by when the soft-power button is pressed. The screen fades, Power LED does not change from Green to Red and the system fan keeps spinning. The same happens while trying to use a regular ATX PSU.
The problem is almost sure located on the IO board.
Here is the power on/off logic behind the /PSON signal (named CH2 in the shematic)
x68000/soft_power_switch_troubleshooting_and_repair.1353415192.txt.gz · Last modified: 2019/08/27 20:44 (external edit)