Look for bad caps, shorted out transistors, blown fuse. Basic LCD monitor troubleshooting guide: http://en.wikipedia.org/wiki/Capacitor_plague
http://s807.photobucket.com/albums/yy352/budm/HP L1740/
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Krishna s701, ALL cold cathode fluorescent lamp, back-lit lcd monitors use the same basic engineering design principles and mode of operation to display information on the glass lcd panel. I suggest you surf over to this old blog and see if something seems familiar!!! http://www.lesliewong.us/blog/2005/05/02/hp-pavilion-f1703-flat-panel-display-blackout-solution/ My best guess is that the internal "switch-mode-power-supply" has detected a "fault condition" with itself or the CCFL electronic ballast circuit and goes into "full or partial shutdown mode" to save itself from a catastrophic, nonrecoverable event!! e.g. sparks, smoke, fire!! 12fixlouie
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