Maybe i should check my eyes ( and my friends' eyes too, we all can't read the display even if it is a bit cloudy )

I find this very strange - you shouldn't have any difficulty reading the display in all but the brightest conditions. I can clearly read the blue display on a sunny day provided the sun isn't shining through the back window directly onto the faceplate - i.e. the brightness is fine, just the reflection is the problem.

We have seen two players with a display fault, in which the display is VERY dim all of the time - quite hard to read even indoors under normal background lighting. A rule of thumb is that you should still be able to read what's on the display with the dimmer set to minimum brightness when indoors under normal lighting.

What colour display do you have?

Rob