That will take more time than repalcing the caps, bad caps can have high ESR, to measure current discharge during the AC discharge cycle of 50~100KHz each power supply will be real hard unless you have very low Z AC amp meter that has frequency response higher than 100KHz and not introduce resistance in series with the cap, if you look at the rating of ESR (PANASONIC fm/fc series cap made for switching power supply, it is in milli Ohm range. Better off replaceing 50 cents parts or use good cap meter that can do leakage, ESR, capacitance test if you want to analyze the caps, shop time will be too expensive. Just my 2cents adn 30 years of experience.
Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
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