My XBox won’t connect and I don’t know how to fix it

I just recently bought an XBox series S all digital off of fb marketplace, the exterior seems fine, nothing seems broken, I’ll plug it in and it turns on just fine it seems and the logo part lights up but when I try to use the hdmi cable it won’t connect to anything. I’ve made sure it’s in the outport, I’ve tried multiple different hdmi cables, I’ve tried two different tv’s and my computer monitor, I’ve tested each hdmi cord and device with other devices such as my Nintendo switch or computer to verify the hdmi will connect, but then when I try it with the XBox, nothing. I’ve tried unplugging everything and letting it sit, I’ve tried holding the power button and restarting it, I don’t know what else to do.