Graphics Amplifier intermittently powers off by itself.

I'm not sure what happened with my previous post, but when I log in now, I seem to not be under the same account.  My previous profile is here: https://www.dell.com/community/user/viewprofilepage/user-id/3407733.  Same email/password/etc. 

 

Anyways, I'm reposting the question in hopes of getting back in touch with Alienware-Rodrigo, since I can't see any of the PMs under my previous account.

 

I'm having an issue where the AGA will simply power itself off. The fans and lights go off. This will happen in the middle of a game, or while doing something non-cpu/gpu intensive. Windows event viewer typically doesn't show any errors, other than a very occasional dwm.exe error, which seems to be windows attempting to recover. I suspect the AGA cable is to blame, or possibly the power supply. Has anyone had a similar problem? I can't find anywhere on Dell's website to order replacement AGA parts.