Monitor powers on, will blink an actual true display, then goes off and will not give another display unless the monitor cable is unplugged and plugged back in and then it only blinks the display and goes off again.
I can't seem to find any schematics for the power supply - which is my guess.
Check the capacitors on the power supply if any on the secondary side are bulged replace them all with low ESR substitutes. Panasonic FC work well.
Also check the transistors around the inverter output transformers there are two on each side. Check them with the diode function of your DMM if any measure shorted replace both in the pair. You can find these on e-bay.
That is a power board / inverter assembly getting it would be extremely hard not to mention expensive.
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if there is no power getting to the monitor ( indicator light ), test the fuse in the power lead first.Ensure it is inserted tightly. If there is power to the monitor, the green indicator light should be steady, if it is flashing there is a problem with the display
Test the monitor in another computer or laptop.
If t stays black , I'd supect a faulty backlight or more probably a blown power capacitor whih will need checking and replacing
I sure sounds like you have backlight problem, since when the VGA cable is connected the power LED turns GREEN and blinks when VGA cable is disconnected, it means the video signal is getting to the monitor OK, so more likely the problem will be in the monitor, but just to be sure, you should also try this monitor with another PC first. Most common failure in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, 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 HP and other monitors to get some ideas what goes wrong: http://s807.photobucket.com/home/budm/allalbums Post back what you see inside so we can guide you further.
michael_b173, You will need to do some extensive reading in my fixya profile and pay a visit to the following web site: http://www.lesliewong.us/blog/2005/05/02/hp-pavilion-f1703-flat-panel-display-blackout-solution/ ALL "cold-cathode-fluorescent-lamp" back-lit LCD monitors are the same in their basic design and operation!!!! Follow the other links you find in my fixya profile responses to other "black" or "blank n black" screen lcd monitor owners to make decision if DIY repair is option for you. Two other fixya lcd monitor tech's (buddymc and budmrtn) are also helpful. Read their stuff also!!! They also have "how-to" and lots of photos of what to look for inside monitors.
Good luck with the repairs. 12fixlouie