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[oedi103]

you can try booting up with the sync button pressed to fix a failed db update but I`d say its rather randomly rrod`ed after the db update.Its the same issue as rrod but the xbox didnt recognise it and still shows green lights.I see it all the time.
You can try the hybrid fix or reflow the gpu if the sync button trick doesnt work.
good luck!

[letsmod]

it sounds more like the update corrupted something try reseting the video

To do this, start the Xbox 360 with no discs in it. Take controller 1 and press Y while pulling the right trigger. The system will then restart, and the video will reset. to default.

or try to clear update DB

Clear Any Failed system updates that cause the console to error.
With the console off, press and hold the sync up button (the small white one)
While holding the sync button press the power button to turn on the console
Continue to hold the sync button until the Console has booted up completely.
During the boot process the console should clear any failed updates, allowing you to use it normally sometiems.
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