Cisco MCS 7825-H3 Powers On, But Nothing More

I have a pair of Cisco MCS 7825-H3 CallManagers, and due to repeated power issues on our campus today, both went down ungracefully went power was lost...and stayed down. So we have no functioning phones on site.
At this point, both MCS 7825-H3's will power on. The hard drives lights flash, then go out (like normal).e The fans spin up fast and loud. But I get nothing else. On the front of the device, the system health LED is solid green, the network LED flashes green with activity, and the hard drive activity LED is solid green. A connected VGA monitor displays nothing.
I am at a standstill...and am not sure if this is a hardware problem, a software problem, or another problem altogether. Anyone have any ideas?
Thank you,
Steve

Steve - if the servers are showing blank screen on monitor connected to console, it appears they are not even initialising the POST process. It could be due to a faulty component - could be CPU, RAM, motherboard..anything....
Generally with this kind of issues, you try to isolate faulty hardware, by rebooting without any component and see if it reaches POST. I would suggest open a case with TAC and I hope the servers have active maintenance.
On another note try changing the monitor cable etc. to rule out any issue with any cable or monitor (which i doubt would be the case) just to make sure and then try a reboot and see if you see anything on screen.
-Terry

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Step 12
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 13
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

Cisco MCS 7825-H3 Powers On, But Nothing More

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