Cisco ASA wont boot – ERROR: Booting system, please wait

Just a quick one, I had this on one of our ASA firewalls, post swapping out its PSU.

ASA Boot Error

Its a lovely error as it just sits there and does nothing. You cannot get into RONMON as this is the first message that pops up on boot.

After a bit of playing I found that one of my RAM chips was causing the ASA to stop, when removed it booted fine. Reseating the RAM again and all was well.

Simple answer to an odd error.

Hope this helps someone else in the future.

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One thought on “Cisco ASA wont boot – ERROR: Booting system, please wait

  1. dingerkingh November 5, 2013 / 4:59 pm

    Thank you very much for posting this. My ASA5520 had the same issue. Just swapped out the ram and it booted right up. Mine happened right after a power outage. This definitely helped me!

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