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Cisco Controller 2504 boot loader failed verification

kevingattis asked
Last Modified: 2015-04-13
I was updating one of my cisco wlc 2504 software to 8.0.

I have done this before without issue; however, it loaded, rebooted.

It showed on the wlc 8.0.

All 5 of the access points, dropped like normal.  I started to see one at a time come back online with the new version 8.0.

Everything looked fine, everything  was working, about to leave the site and then cisco WLC froze.

I waited about 10 minutes and it never responded.  Turn it off and back on, now I get

"Improper system operation detected
 System has been halted because:
1. Boot loader failed verification"

I ended up buying another and shipping it overnight to get the site back up.

Anyway to fix this one?
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