yellow light flashing No game play

Hi I posted this in general by mistake.

My xbox top light is flashing yellow. Can't play games.
my modded page comes up but after that nothing blank tv screen tried several games.
ALso if I take a game out and boot with regular xbox nothing shows.


HHHEEEELLLLPPPPP

 

something similar happened to a friend to his xbox, i think u will need to go where u installed the chip and tell em to fix it

 

Thanks all looks like I had to blow out the dust on the av connector and replug. All is well now