power switch problem

[kanako]

my dad just brought a asrock 775 dual vsta and a e6300 exactly the same board and chip im currently running
The problem were having is it wont power on ive tried the front panal connecter both directions to no joy
ive tried all my parts the only difference being the board and still no power on so i tried my board in his case with my psu and that wouldnt boot so i tried another case still no power on the only difference ive found with my case and the other 2 ive tried is the front panal cable for the power switch is the 2 that didnt work being blue and white and mine being red and black
does this make a difference ??

 

[kanako]

definitely in the right place,the only thing else i can think is the front panel cables,in the two cases that dont work,the power switch cable is blue and white twisted ,and the other is red and black and works