I have xbox 360 E .
if you have this problem RROD .
# turn off the console.
# Remove the HDD. clean it with air blow.HDD Socket / Console HDD Socket.
# put it back. and start console.
if your console not remove the issue. use 2nd step.
1 . Remove all cables from console. include HDD.
# Put the console for 10 to 12 Hrs.
# after 10 to 12 hrs. connect all cables and HDD.
# start console and press Syn Button + eject button for 2 /3 second.
# than press the power button.