[Q] Phone Completely Unresponsive

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http://forum.xda-developers.com – So, I tried to update my Captivate to Gingerbread via Kies to prep it for CM10, and it hung on the 'Firmware Upgrade' Eventually, I pulled the plug and tried the 'Emergency Recovery' That ended up hanging too. And now my phone is completely unresponsive. I don't see the Computer-- >Phone icon, I can't boot into download mode, nothing, just a black screen. I tried pulling the battery, sim card, etc. and nothing. Plugging it into the wall also has zero noticeable effect. Am I SOL or is there some hope of resurrecting this beast? (HowTos)