Question PC not booting

Jun 3, 2020
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So I have a PC which was working just fine but one day it just didn’t want to boot there is a dram led on red I tried changing the ram and the slots too but nothing

Specs:
Mobo: sabretoothx58
CPU: i7
Gpu: gf210
Ram: corsair xm3 1333mhz 16gb(4 x 4)