Xbox360 Intermittent Gray Screen on Startup, controller won't work

[Brooxy]

From time to time when I start up my xbox360 I get the usual scrolling
through the initial screens including the logo page and audio but it is all
in a monotone gray (instead of the usual green). Added to this the green
light on the controller just circles around continuosly and won't work. Is
this a know problem? Is there an obvious fix or does it spell trouble. I have
tried ensuring the console is cool but it still happens.

Many thanks for any help.

[ngghgh]

so you are

Post by Brooxy
From time to time when I start up my xbox360 I get the usual scrolling
through the initial screens including the logo page and audio but it is all
in a monotone gray (instead of the usual green). Added to this the green
light on the controller just circles around continuosly and won't work. Is
this a know problem? Is there an obvious fix or does it spell trouble. I have
tried ensuring the console is cool but it still happens.
Many thanks for any help.