Xbox starts up right no red ring of death but

Yes this is becoming more of a common error and the reason that it happens is because of the sensors on the back of the DVD drive overheating.

All you need to do is stop the heat build up and you will be fine.

To do this you should use a good Xbox 360 Repair guide or send it in

This is a common fault with the 360, it says that its a "general hardware failure" which could mean
anything
really. In truth its the lead free solder that cracks with so much heat and as a result the Xbox 360 fails
causing the 3rrod (3 red rings of death) or e74 or even no sound but graphics or sound and no graphics
just like you are reporting.

Firstly get a spare AV cable from someone else, try this, if that does the same then try a different
SCART
input on the TV. if all this fails you need to fix your machine as it WILL get worse

You will need to get a 3rrod repair kit or get someone to fix it for you, there are guides available on the
internet. I'm in the middle of producing one right now that I will make available free of charge for all fixya
members. To remedy this you need to strip the console down and replace what's called the X-Clamps, at the same
time replace the heat-sink paste and then you need to re-heat the whole board. We use a special IR over
which re-bakes everything and re-seats the solder properly, a lot of people use a heat-gun but you have
to be very careful
Linda