No signal on display
After cleaning and upgrading the gpu and cpu of a friend's pc it fails to post, all fans spin up and fan rgbs turn on but no signal on display (yes hdmi cable in the gpu not motherboard)
First I tried reseating everything and putting the old gpu in since the new gpu's fans werent spinning on boot, old gpu spun on boot but still no signal on display
Ive checked all cables and replaced the cmos with my own, also plugged in my own PSU and my own ram in different slots, none of these fixed the issue
So im left with the mobo, cpu and storage
I dont have any thermal paste on hand so I dont wanna swap out the cpus and my system has an AIO which makes swapping stuff out a tad harder
Is there any way to know wether the issue is the mobo or the cpu? The cpu was my old one and worked fine on removal no bent pins or anyrhing and was installed withoit problem as far as I could tell
Friend's system
Cpu: old ryzen 5 2600 new ryzen 5 5500
Gpu: old rx 580 new rx 6600
Psu: 500 watts evga
Storage: 1 m.2 240gb ssd(?) 1 seagate hdd
Ram: 2x16 3000mhz 18CL ddr4 sticks1 G.Skill aegis