My Creality Falcon 2 that I had for 35 days is not working. Alarm 3 and Alarm 8. Laser will not move.
Check and make sure laser is tripping your homing switches.
As asked by @Dskall
a) does your machine even attempt to home?
b) can you double check your power adapter is actually getting Mains power?
c) sounds like you have 2 problems and i suspect both replated to power
Alarm 8 = homing related
Alarm 3 = controller crashing
thinks. you might want to recheck the power source
Also homing how does it sound if machine even attempts to move
lastly, belts all correct and tightened