I think there's nothing wrong with the color as your brand logo, but perhaps think of making another color accent it nicely on your home page or making it a more subtle part of your color scheme. The way you have it set up on other pages is a nice compromise (even though I think it's still a bit too yellow):

http://www.happybuy.com/product/Apple-iPad-MB292LLA-Tablet-1...

I just want to reiterate: everything else on your site looks awesome (really awesome)..but that giant yellow block really hurts my eyes.