unused SMPS rail

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its a very small SMPS made for external hard drive or optical drive.
it has 12v@1.8A and 5V@1.5A
i got an electronic musical instrument from europe (im in canada) reqires 1.5A 10.5 v

under load the 12v was only 11.5 so i went ahead and powered the machine..worked fine. hours went by while i was having fun 😀

my question is..will something blow because there is no load on the 5v? everything sems fine now.
 
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