I just had an HP f1703 LCD monitor with an unusual fix and thought I'd pass on the info.

Unit would loose the picture about 2 seconds after power up, and the power LED stayed lit. The back light inverter board was shutting down and I initially suspected the caps. Pulled a few and they tested OK for value.

Then I noticed a fractured solder joint on a toroidal inductor lead. A little soldering and it's back in business. I guess the high frequency vibration caused the connection to fail with time since the unit is from 2003.

Bad caps have been the cause...