white led cpu on motherboard when switched on

Dec 31, 2018
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I unplugged everything from my motherboard, I took the motherboard out from my case and onto an anti-static bag, then I took the cooler off, took the old thermal paste off with isopropyl, then the same with my cpu (kept in socket). Then applied new thermal paste to the cpu (pea size), put the cooler back on, placed the motherboard back into the case, plugged all the cables back in (yes, the cpu power and motherboard power cables are connected correctly). I switched my my pc back on, and there was no output, and the White cpu led came on, on the motherboard.


MSI A320M pro vh-plus
AMD A10 9700
8GB RAM DDR4
COOLERMASTER MASTERWATT 550


it is a prebuilt, but I'm upgrading it in January.