I know exactly what you meen! I had the same problem. I bet your gba sp, is a black one. There seems to be something wrong with some gba sp black series. You could read my post at gamefaqs.com :
http://cgi.gamefaqs.com/boards/genmessage.asp?board=969&topic=9716456&page=0Or you could do the easy thing, and read the the 3 messages I posted there, which I have now posted here down below!
My problem(TOPIC): I finally baught myself a black gba sp, but what a terrible frontlight!
1st post:
The light was very bluish, way more than I ever could imagine. And there was a very strong blue line almost at the bottom of the screen, that only went away at one specific angle. Why couldn't nintendo just have used standard "yellow" light?
Boy was this annoying, now I have to return it, and get my money back. And the most annoying thing is that I already had ordered gba sp accessories some days ago, and they are one their way.
It's real funny that I have not heard anyone else complain about this.
2nd post :
Well when I use it with the frontlight off, in good light, and then turn on the frontlight, I can see that every color gets/becomes a little bluish/lighter color.
But, that might be how everyone has it, I don't really know anyone else who own one. But the very bad thing is the blue line that goes across the screen almost at the bottom. My friend and my family said that it wasn't hardly noticeable, but I must have perfection. So the blue line bothers the crap out of me.( Can't possibly keep it, if it's supposed to be like that).
3rd solution post:
I went back to the store today, and looked at some other black gba sps. They all had the similar problem. Maybe something wrong with a black gba sp, series or something.
Anyway I traded it in for a platinum gba sp, which indeed was perfect. So now I am jolly as ****!
This may be a warning to anyone buying a european black gba sp. Before you buy, check that the frontlight is ok before purchasing.