What's the voltage on the purple wire (+5V stand-by) while powered-off? The green wire is PS-ON; if you short it to pin 16 using a paper-clip, does the PSU power on?
I have tested the PSU powered on by a paperclip with a multimeter. Here is the result.
Yellow : 12.17V
Red : 5.09V
Orange : 3.38V
Blue : -11.6V
Green and grey wire : 2.96V
I suspect the results of blue and black wire and green and grey wire are abnormal. The former one should be -12V and the later one should be above 5V. Could these two abnormal results prevent my computer from booting?