NEC 50MP1 monitor

[kist1000]

Can any help I have a nec 50MP1 monitor recently it developed the following faults. first it had two black horizontal lines running. Now it has 3 black horizontal lines running across the screen. dose anyone  have any idea what the fault is or how i can get it repaired ?
 

[tv tony]

hello,
                 likely to be either dirt on one of the y-drive pcb connecters, alternatively one of the drive boards themselves, who makes the panel?

[kist1000]

Hi, thanks for responding it a nec 50mp1 colour monitor it has NEC Model NP50C1MF01, written on the back of the display. Iv'e checked all the horizontal connector strips there are 5 on the right hand side and 8 on the left hand side.  there are two small driver boards down the left hand side  the board no is PKG50G1E1. are these boards expensive and where can i get them from ?