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First make sure your video card driver is up to date, and the monitor driver as well when they are available. If the computer reboots when this happens, there is a hardware conflict potentially.
If the monitor goes black like it was shut off abruptly and computer did not shut down- replace all the electrolytic capacitors in the monitor on the power supply board. This should forestall an inevitable failure of the monitor.
I would try shutting down the computer in the normal way, and turning off the monitor. Boot up and turn the monitor back on. If it still doesn't work, then I would check the cables and power plugs and wall plugs. Check the mouse and keyboard cable and any other cables plugged into the computer. The next step requires a seperate monitor or laptop. Try unplugging the monitor and pluging in another monitor. Most laptops have a common VGA adaptor jack or even an Svideo jack. If the other monitor does not work, Then take to a qualified technician for repair. It could be your power supply in the computer or video controller.
I hope this was useful and please comment if this was helpful to you.
The most common cause of dim displays on this unit is a failure in the back light power supply. This problem can be fixed if you can do a little soldering. Here is a link to a repair guide that will show you how to dis-assemble and repair the power supply board.
You just bought a new power supply for the monitor? Did you set the B+ voltage to the correct settings. Rebuilt power supplies for CRT monitors are not set correctly at the factory. Use your schematic to determine the proper B+ and then set this under load.
I had my Optiplex GX520 at work shut down abruptly every time I turned it on it in the morning. This would always happen within the first 30 minutes. I would then get the flashing amber light. After starting the PC again, it would stay on all day (over 8 hours) without shutting down again. I found that the power supply was over-heating. Two things need to be done. First, in order to get the amber light to stop flashing, un-plug the computer from the wall for 30 seconds then plug it back in. OR hold down the power button for 10 seconds or so. The light should stop flashing. Then press the power button again and the PC should start. But why did it abruptly shut down in the first place? The power supply has a fan-speed-control circuit in it to keep it running slow and quiet when the power supply is cool. It gives the power supply lower voltage when the power supply is cold and higher voltage as the power supply gets warmer. This circuit either is not working correctly or the fan getting sticky over the years and needing more voltage to get it moving when it is cold. I found that the fan was not starting at all and causing the power supply to over-heat. To keep the fan moving at full speed, I cut the wire to it and wired it to the +12v output directly. Not the fan goes at full speed all the time. And yes, it is nosier.But at work it doesn’t matter. The best solution would be to just get another power supply from Dell if possible. Or buy a +12v, 70mm fan from Digi-Key and replace the original.
Check to see if the image is Dimmed. Chances are the power supply on the FPD is either dead or not supplying power to the back lights.
Your problem is the power supply or the inverter on your board, you can replace it and it will be fixed. Easy Fix REALLY EASY FIX (inverter is what supplies power to your backlights. A lot of the times the reason a monitor goes black and the green power button is on, is because the backlights shut off. in most designs of the 1730 the inverter is embedded on the power supply. That is most often the case on this problem. Power supply/Inverter=Replace it and you will have a spanking new looking nice monitor working again. :)
Sounds like it may be overheating. If you get warning beeps on startup that sounds high, low, high low, it is overheating. you should inspect and clean the fan on the processor with a vacuum or compressed air ans also clean the power supply area with a vacuum to clear all the dust out. Inspect and wipe any other dust away from the motherboard and card inside. After restarting, it still goes off, check that the fan is running during startup. If not, the fan needs to be replaced at a nominal cost. This is an easy fix. If this all fails, let me know so we can troubleshoot everything together.