red light red light

[widowmaker46]

ok ive had my xbox chipped for a year now and had no problems with the xbox or software or disks but today i put the xbox on and played a game for 10 mins and then the green light turned red and stayed red it would not turn off or eject using the xbox buttons. i had to turn it off at the mains.when i turned it on, it came on red again so i turned off and left it for a while, then i turned it on again and it was ok for 10mins then the red light came on again .any clue as to the trouble????please