HELP ME! "Reboot and Select proper Boot Device..."

Nov 18, 2018
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So i have my PC over a year now and it always worked perfectly fine. Until i received the error message "Invalid signature detected", if I pressed OK the message "Reboot and Selected proper Boot Device or Insert Boot Media in selected device and press a key" showed up and I already couldn't open BIOS. Because of that I bought a new HDD, exactly the same type I already had. With the new HDD I didn't receive the message "Invalid signature detected" anymore but the message "Reboot and select proper boot device..." still showed up and I couldn't enter BIOS. I don't know if it helps you solve my problem but before all of that my PC made some strange noises while turning it on.