Try upgrading the firmware if that option is available
lab@exB-2> show chassis firmware
Part Type Version
FPC 0 uboot U-Boot 1.1.6 (Jul 5 2012 - 11:58:22) 1.0.0
loader FreeBSD/PowerPC U-Boot bootstrap loader 2.4
I can upggrade the firmware on SRX, but could not find a command to do the same on the EX. Someone could chime here?
This can be run on the SRX
>request system firmware upgrade re bios
reboot then,
>request system firmware upgrade re bios backup