I am having a big problem with my system. Every time I push the power button the computer starts to power up but then turns off. I have tried most of the basic things like, cleaning it out, checking the connections, checking the power supply, so on but nothing works. I was told that Dell will replace the Mother Board but I have had the computer over two years so I don’t think it under warranty. I have so much on my computer that I need to work every day so I’m lost. Can anyone help. Is there something I’m not thinking of? Anyone?