The question would be if dhcp fails or if a static ip is assigned or there is some other
user or system error causing this behavior.
If its an older software unit no Cisco logo might be shown.
Try a factory default reset first, its also handy to have a switch with a monitor port (or even a hub)
to see whats going on on the ethernet wire (like using wireshark).
How to do a factory default reset:
https://supportforums.cisco.com/videos/4440
The Ex60 should also have a console port where you can monitor the boot process, its not
rs232, but ttl level with a special pin out, so you need a special cable.
Its possbile to build it yourself, and at least on my ex90 it works great:
https://supportforums.cisco.com/docs/DOC-24305
If all this did not work out for you and you do not get a good answer and you have a service contract
consider of escalating this thread as a service request to TAC
https://supportforums.cisco.com/docs/DOC-13613
Please remember to rate helpful responses and identify helpful or correct answers.
