Problem with uniformity of the light on my screen

Hi,

The screen of my macbook was black. I have changed the inverter and the inverter cable, but now, the brightness have no uniformity on the screen.

The brightness is uniform only with full light, but only the right part of the screen is still lighted when I reduce the light with the brightness buttons.

Does anyone have an idea where the problem comes from? CCFL ? My inverter isn't good?

Many thanks

Chester