I have a new build and im useing a pc power & cooling silencer mkIII 500W and it seems to be arcing within the psu when i run minecraft but ceases when i open a youtube video also. i just got this running so im not sure what else may trigger it. anything i can try before sending in for a mra?
I don't think I would trust it. If it's arching now when it's new, it will only get worse as it gets older.
Agree with the above ^^^
Change the PSU NOW !
Before it blows your motherboard and cpu....
All the best Brett
wait....what? do not turn it back on. it could damage something else get an rma.