Little help here <3. Black screen. Cpu/gpu

Feb 16, 2019
Howdy there peeps
Having a little problem here, today just arrived a new cpu I recently bought, the AMD Athlon X4 870K Black Edition with Thermal Solution 3.9 4 Socket FM2+, with no integrated graphics. When I replaced it from my previous apu, computer started, everything ran well, except for the gpu, ZOTAC GeForce GTX 1050, 2GB GDDR5 DisplayPort, HDMI, Dual-Link DVI-D, Super Compact Gaming Graphics Card, which worked just fine with my previous apu, AMD AMD A6-7400K Dual-Core 3.5 GHz Socket FM2+ Desktop Processor Radeon R5 Series, I’ve done couple stuff, switch ram slots, reset cmos, unplug and plug everything, made sure monitor works, tried reinstalling drivers with my old apu, made sure everything is compatible, but whenever I try the new cpu I get a black screen, no bios no nothing, the cpu cooler runs with no problem, only problem is gpu not being read and starting in the beginning but dying 5s after. Don’t think it’s a power problem because the gpu ran just fine with my previous processor. Power supply is 400w.