How to solve the module failure?

Switches are made up of many modules, such as stacking modules, management modules (also called mastering modules), expansion modules, etc.. The probability of failure of these modules is very small, but once a problem occurs, it will suffer great economic losses. If you are not careful when plugging and unplugging the module, or when handling the switch, or the power supply is unstable, etc., it may lead to such failures. Of course, the three modules mentioned above all have external interfaces, which are easier to identify, and some can also be distinguished by the pointing lights on the module. Por ejemplo, there is a flat trapezoidal port on the stacked module, or some switches have an interface similar to USB.
There is a CONSOLE port on the management module, which is used to establish connection with the network management computer to facilitate management. If the expansion module is a fiber optic connection, there will be a pair of fiber optic interfaces.
When eliminating such faults, first ensure that the power supply of the switch and module is normal, then review whether each module is plugged in the correct position, and finally review whether the cable connecting the module is normal. When connecting the receiving module, also consider whether it adopts the specified connection rate, whether there is parity, whether there is data flow control and other factors.
When connecting the expansion module, it is necessary to review whether it matches the communication mode, such as whether to use full-duplex mode or half-duplex mode. Of course, if it is confirmed that the module is faulty, there is only one solution, that is, to contact the supplier immediately to replace it.