[dba-Tech] Keyboard Problem

Dear List:
 
I recently replaced the fan and heat sink on an HP mini 210 - it was making
a grinding noise.  Now I have a problem with the key board.  I do not know
if the problem with the keyboard existed before I replaced the fan - which
required removing the keyboard.
 
I have reseated the ZIF connector and it looks like it's lined up right -
it's hard to miss with those. What I'm wondering is if it's the keyboard or
it there's anything else that could be wrong that replacing the keyboard
won't fix.  I can get a replacement for $15 including shipping.  
 
The keys that won't work are 
 
Row 1 - Backspace
Row 2 - qwer uiop
Row 3 - gh '  (Enter works)
Row 4 - all work
Row 5 - arrow keys (ctrl and alt work)
 
Any ideas of anything else that might be wrong with this other than the
prime suspect?
 
MTIA
 
Rocky
d