Do you have ESR meter to verify the caps ESR? BAD cap can look OK and OK capacitance.
For example, this cap look normal and normal capacitance of 100uf, but ESR is more than 3 Ohms, it should be 0.2 Ohms or less http://s807.photobucket.com/albums/y...t=DSCF0262.jpg
As budm states, caps are one of the main problems with these,C10 and C11 particularly.Also the Backlights on these are regular failures due to the age of the Monitors.Would suggest you work on one only,and that will give you a head start on the problems with the rest.
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