Hello. I have a gx280 system, It won't boot up about 1 out of 3 times. The reason is not to find a hard disk. The messege shows me " No SATA hard drive". Whenever the computer failed to be booted up, I opened the case and replug the HDD cable in. It clears the problem so far. Also I replaced the HDD cable either but it still has the problem. The dell assistance in online say that the problem could be the cable or mothboard. I don't know what I should do now. Should I buy a new board or throw this Dell away? Or anyone has a solution for this? Thanks.