Hacking how to easily check if an xbox 360 E has RGH installed?

[kisamesama]

Hi,
Going to buy a used Xbox 360 E.
Seller says it's modded to play pirated disc games but does not know what hack is in there.
Is there an easy way to verify if this RGH or just a flashed drive?

 

[DinohScene]

Boot it via the eject button.
If you see a blue screen with XeLL Reloaded, it's RGH'd.