Monitor screen remain black,power supply ok

Try EBAY: http://shop.ebay.com/sis.html?_nkw=Proview+PRO758+LCD+AC+DC+Power+Supply+Adapter+Cord+Plug

Failed TV and monitors: http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague

Try clicking on Window at the top of your page the click on ZOOM in the drop down box. This should maximize the screen to the monitor it is currently on,

First place to look will be the power supply section, look for bad caps (bulging tops or bottom seals), the post back what you see so we can guide you further for direction such as voltage checking, see example of failed monitors due to bead caps: http://s807.photobucket.com/home/budm/allalbums

take a look at the lower side of the back

spc12b, Have you tried the flashlight test yet? How old is this monitor? Your monitor has a 2 types of power supplys in it. A switch-mode-power-supply and an "INVERTER" supply. One or both of them could be having a problem. The inverter needs DC from the smps to change it into AC to light up the cold-cathode-fluorescent-tubes that are hung in back of the lcd panel. Let me know results of flashlight test. After screen goes black, hold light 1-2" from screen at different angles. Let me know if you still can see the win-desktop screen even though it is still dark.. Bye for now. louie12fix on fixya or lmistyrel @aol.com

Please try to check it from Control Panel > Sound, speech & audio devices > Sound and Audio Devices > Hardware tab > then select the Device Name then click Properties tab to verify its condition status or you opt to click Troubleshoot tab. regards

i would suggest getting a new monitor you might have made it overheat or your display driver failed.

bad capacitors on the board, replace these and the inverters should get there power.

I had the same problem with my Proview monitor. I was told by a lot of people it was trashed. I typed in this website ati.amd.com and discovered my ati driver was either missing or some components were missing.
I downloaded the driver and now my monitor is staying on. I don't know if this will solve your problem like it has mine, but it's worth reading up on it.

Ok based on just the monitor turning off Lets try this,,
FOR WINDOWS XP
1.) Right click on your desktop
2.) Choose properties
3.) Click on the screen saver tab
4.) Click power
5.) Set The POWER SCHEME to Home/Office Desk
6.) Set the Turn Off monitor to Never
7.) Set the Turn Off hard disk and system Stand By to never
8.) Click apply then ok
9.) Repeat steps 1 - 3
10.) Set the wait time to 30 minutes
11.) Click Ok
12. Shut down and restart your system and wait 30 minutes to see if the monitor will shut off if it doesnt then Your good to go
If it does Then disable the screen saver.. and wait half hour to see what happens

POST BACK HERE AND TELL ME YOUR RESULTS OF THE ABOVE SO WE CAN TRY SOMETHING ELSE