Screen does not come on at all, cheched hi voltage to lamp and there is none, we have several chimei monitors with the same problem is there a common component in the PS that fails? Model is A170E

Unless you have a high voltage probe that can measure up to 2000v, you will more likely blow up your meter input circuits, firing voltage for CCFL is from 1500~2000v, running voltage is about 500~800v.
How do the DC filter caps look, that will be the first thing to check? Do you have 12vdc feeding the inverter circuits?
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.