First, check that the security key is securely fitted and is not loose - remove it and reattach it again;
if that doesn't help, then there may be a stuck button on the console that is preventing the others from responding, or there may be some loose wiring inside the console.
Reply back and let me know what you find...
Happy New Year!
If you have already tried that then the console has a more serious fault and will likely need to be replaced.