I chipped my xbox (version 1.5) with the aladdin advance chip, it was working great but wouldnt play cd r white tops. I have another xbox also chipped with the sst chip which has a samsung drive in it which plays anything you put in it. So i decided to put the samsung drive into the new xbox with the aladdin advance chip in it, this is where it all went wrong for me and i cant get my head round it what has happened. As soon as i put the samsung in the xbox it powered up then shut down everytime i booted it up. I then took the advance chip out and put the dvd reader back in the xbox but it is still turning itsself off. I can boot it up and it will boot ok, but if i tap on the xbox it shuts off. Ive checked the mb over and over again and all the cables are in correct. All i did was swap the dvd drive and this happens. If anyone has any ideas what it could be, i would be most greatful for your help. Thanx lee.