Anytime you hear, “thumping” or banging noises when your machine is printing or making copies, it indicates you have a serious problem and you need to call for service immediately. There is are many gears in a multifunctional copier or laser printer that are moving during the process of the digital image from the machine being transferred to the paper itself. When you hear a thumping noise during the printing process, this indicates that somewhere in the machine, there is a bad gear. Most of the gears in a multifunctional copier or laser printer are plastic and if the problem is allowed to go unchecked, it will destroy, damage or weaken the other gears or assemblies connected to it. That’s why it is a good idea to call for service immediately.