I have opened up my Xbox 360 because there was so much dust and then I used a vacuum to get it all out I also disconnected the disc drive then I put everything together and now when I start up my Xbox the green light in the middle of the power button just constantly flashes and there is not video on the TV and the disk drive has some issues opening and closing.
Please. Never use a vacuum on a motherboard again. It probably didn’t cause your problem, but if you continue to use that method for dust removal, you will end up with a big problem.