Switch circuit board failure

The switch in the use of the process, in a dual-machine state can not run, through detection, the signal is the standby side of the circuit board is not normal.

This fault is obviously a hardware failure. First of all, we can replace the circuit board of the standby side with the replacement method. If the fault is still not gone, the real fault is not here. Racks, modules, power supply and connection devices can cause standby side failure. The equipment is inspected by the method of elimination. From the manual to the two-machine command, first by the main side to receive data, and then by the main side through the main control circuit board to the standby side to send the collection, the standby side of the self-test and so on. At this point, if the standby side is normal, you can reply to the main side. In this case, however, the information provided by the standby side cannot be received by the main side. The standby side does not receive the main side of the two-machine instructions, these conditions with the main side of the main control of the circuit board has a great relationship. Therefore, it can be restarted, and then force the conversion of the Central processor module, and the original main side of the main control circuit board replacement, failure disappeared.