If it has just gone black the inverter board has probably failed. If you have green power light and no picture that is the main symptom. www.lcdrepair.us sells the parts for that unit and has instructional videos.
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hi, extremely common problem for dell 17 in monitors. the capacitors and transistors on the power board internally have gone bad. to get repaired, it may cost 40-50 at a shop. i have repaired these in the past and they always come out well for at least 3 more years. may want to find another monitor though. if you would like steps on how to repair, let me know and i will find my old repair threads to give to you.
some transistors on the board have shorted they supply power to the inverter to run the lamps, they power is not cut off intermittently and the protection circuit has stopped the monitor. the fix is here
http://josepino.com/other_projects/?howto-repair-dell goo dluck if you want it fixed for you let me know
Hi Gaz, First, verify the monitor is functional. Monitor STFC (Self Test Feature Check) Turn off the monitor Plug the monitor power cord directly into the wall socket to remove any surge protectors or APCs from the troubleshooting equation Unplug the monitor video cable from the back of the computer Turn on the monitor The floating dialog box should appear on screen against a black background. If the issue appears during the STFC, the monitor is defective. What are the results please?
This sounds like the back light is gone on the monitir... to check this look very close at the monitor whet the PC has booted, if you see a VERY dim image on screen then it suggests that the back light is gone.
Many monitors hace a 3 year warranty so I would try a warranty claim before throwing it away