VECTOR: Tech: Tempest trouble

My tempest has what seem like two different problems: 


1st problem- the "mazes" are displayed correctly and gameplay is 
accurate, but the text is all stretched out and unreadable ,unreadable 
in that the text is weird symbols. 


I re-seated the ROMs and checked the interconnect cable (seemed ok). 
Voltages are OK. No change in problem. Any idea what I should check next?


2nd Problem- When I shoot the screen dims for a spilt second. If I 
shoot rapidly the screen blanks out and the spot killer comes on. 


This is with WG from my Space duel in the cabinet ( has LV2000 and Atari 
input protection board). I took out the original non-functioning WG and 
did a cap kit and it now works fine in my space duel ( it doesn't have 
the input protection board or the lv2000). 


The games are in different locations. Could the dimming/blanking out be 
that the Input protection board is coming into play? Should I swap 
monitors back they way they were? 


Thanks in advance, 
Bob