Question Tried to change GPU and now it won’t give any type of output

[beotng]

Basically what happened was me and my older brother was changing the GPU on my pc. we took out the old one and put in his old GPU (the 2060). When we were going to boot the system up there was no output from the GPU. I tried to troubleshoot for hours but to no prevail. So my final option before giving up was to ask for help. So please help me I’m losing my mind
System:
Mobo: Asus prime h510 a wifi
GPUld(nvidia gtx 1660) newNvidia rtx:2060)
CPU: intel i5 11400f
Ram :Kingston fury beast black 16gb (2x8)
SSD: Kingston nv1 nvme ddr4 1tb
PSU:Cooler Master MWE White 500W PSU

 

[lvt]

Does the old GPU work when you put it back?

 

[beotng]

Does the old GPU work when you put it back?

No, the old GPU does the same thing and won’t output anything