Lcd dimming problem, on MacBook Pro a1260?

i have replaced the LCD screen, now it seems when i want to dim the screen starting from the rightmost bar will start to dim correctly until i reach the last bar to the left where at that point the brightness of the screen is reversed to full bright.

then if i leave it down to second to the last bar where it is dim then after a few min. the brightness is back with out touching the keyboard or mouse or any part of the laptop. but if i touch it the screen returns to dim.

almost like a reverse affect the screen should turn dim when i don't touch and bright when i do.

i am think the inverter board, but wanted to get a second opinion

i already tried the automatic sensor on or off makes no difference.

any info is appreciated.