Power supply not recognized by M-series router

Some power supplies for M7i and M10i might contain an incorrectly programmed I2C ID.As a result the following errors appear in the show chassis alarms output: user@M10i-re0> show chassis alarms 2 alarms currently active Alarm time Class Description 2006-11-29 16:21:22 GMT Major PEM 0 Unrecognized for the platform 2006-11-29 16:21:22 GMT Major PEM 1 Unrecognized for the platform A fix is provided in JUNOS  8.1R2, 8.2R1 and higher JUNOS releases. Below there is an example with a step by step procedure: Check which power supplies are not recognized properly:    root@Junos-re0> show chassis alarms     2 alarms currently active    Alarm time               Class  Description    2006-11-29 16:21:22 GMT  Major  PEM 0 Unrecognized for the platform    2006-11-29 16:21:22 GMT  Major  PEM 1 Unrecognized for the platform Go to the shell and and use command su to change to super-user:    root@Junos-re0> start shell      % su    Password:    root@Junos-re0% Use the smbc command to read out the currently (incorrectly) programmed I2C ID for PSU in slot 0:    root@Junos-re0% smbc -g 2 -o 5 0x56 1    Read from bus address 0x56 returns:    0x06 Re-program the I2C ID for the same PSU:    root@Junos-re0% smbc -w -g 2 -o 5 0x56 0x0E Verify if the the I2C IC has…