Analogue-sequencer

Hi all

The story, i just bought a p3 and as I was at the sellers home the
screen (i think the pled screen, it's green on black) didn't light up
right, he didn't knew or told me before, so he made me a fair price
for the p3.

Well the strange thing is, that all the time other pixels don't light
up right, sometimes it's in the middle sometimes it's in the
upperright corner of each number/letter, kind of random, but i think
dependent on the menu or the number/letter appearing.

Shall i buy a new lcd screen or is there an other way to fix this?

thanks for help

Greez