it is not accompanied by electrical arcing is it normal to see a white flash from the motherboard led when i turn the psu on ?Is the flash something new?
If it came from inside the PSU I'd be worried.
Not sure what to make of it if it came from somewhere else, especially if not accompanied by a noise like electrical arcing or a pop sound. It could be white LED's on the motherboard flashing, or the RGB setup you have, but could also be something on the motherboard.
Many motherboards light some LEDS in a sequence while running POST as they boot up. That could be the light you see...check your manual to see if it has them.it is not accompanied by electrical arcing is it normal to see a white flash from the motherboard led when i turn the psu on ?