Keyboard problem on PB G4 Mercury, 400mhz?

Hi guys,

I've got a problem with my keyboard on PB G4 400mhz Mercury since yesterday....

To be precise I've got problem with two lines of keyboard,with numbers line from 1 to 0 and with line below,from Q to P!

Everytime when I press 1 it shows 1Q on screen....the same is with 2 (2W),3 (3E)....etc....same thing happens when I press Q,it shows 1Q like the number is also pressed??

can someone help me with this issue and tell me how to fix my keyboard??

is it problem with flex cable or what?

all other buttons works just fine except these two lines!

p.s. I've done some removals of keyboard recently,so maybe that can be a problem...I don't know really.....

But why just that 2 lines?

I would appreciate any help!

Thanks in advance!!