Keyboard not working after I turn on my computer.

It’s most likely a software or firmware issue rather than a hardware problem. Since your keyboard works after a restart but not after a full shutdown, it suggests that the drivers or firmware aren’t initializing properly during a cold boot. The most common cause is Windows Fast Startup, which can interfere with device initialization. Try turning off Fast Startup in your power settings, then shut down and restart the computer to see if the problem goes away. If that doesn’t help, update your BIOS, chipset, and keyboard drivers, as outdated firmware can also cause this behavior. Only if the issue continues after those steps should you consider a possible hardware problem, like a loose internal keyboard connection.