Question about -5 voltage on astro city

[Arcade-Projects]

hi guys have a question for you i have a astro city with its original power supply i was just checking voltages with my multimeter on the jamma edge under load and im getting perfect 12v and +5v but when i measure the -5 i get -0.008 is this normal i also verified this at the psu connector with and without load still reads the same could any of you check your voltage to see if your getting anything for -5 or is this normal thanks for the help!!

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