Tv screen grows darker while playing...

We just brought a new 250 gig slim model so we could play it on on our high def tv.  We hooked up the console with the hdmi cable.  The picture is bright and vivid and looks wonderful.  Then about 45 seconds to a minute after starting a game, the tv screen gets darker. 

It doesn't matter what game, it does this on all games- even arcade downloads.  If we hit the picture button on the tv remote, the picture becomes bight and vivid again. Once again after nearly a minute, the screen gets visibly darker. 

You can still see what is going on and there still is a picture.  But it is as if the brightness has been turned down a lot.

The tv is fine with movies and other game systems.  Which leads me to believe that it is the xbox 360 that might be a problem.

Has anyone heard of this happening?  Any suggestions as to how to fix this?

Thank you in advance!


Question Info

Last updated July 4, 2018 Views 1 Applies to:

Update:   I was sent a private message ( thank you by the way ) and they suggested to try a different hdmi cable.  We took off the official microsoft hdmi cable and tried the LG one that came with the blu-ray player.  It worked.

So it looks like the problem is a defective MS hdmi cable.  

I am updating this just incase anyone else has a similiar problem.  :)

Did this solve your problem?

Sorry this didn't help.

Great! Thanks for marking this as the answer.

How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site.

How satisfied are you with this response?

Thanks for your feedback.