Faint green discoloured screen then screen is blank

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Open device and dry it properly

It can likely be repaired, but will probably cost more to repair it, than replace it, since even 24" LCD monitors cost around $125.

check power saving setting.

Might be your graphics card, try swapping it out for a new one and see if that works

mark587, Did you shine a very bright flashlight 1" from the screen to try and see the WIN-desktop ?? Even though the screen appears BLACK. Your words above said: JUST CAN'T SEE IT Did you really NOT see anything? Have you seen any of the longer video clips of "LCD Monitor Disassembly" on YOUTUBE? Some BLACK screen "symptom" lcd displays can be repaired for less than $10 in parts. Capacitors! Also check videos on lcd repair. Then get back here to fixya and I or any of the guys can help you decide what to do with your display whoose screen is now dark and lifeless. After doing the YOUTUBE thing you may even tell us what you will do!!! Hope this was helpful. Yes we do want to hear back from you. please rate this response on fixya. I'm louie12fix on fixya or lmistyrel @ aol.com. Bye for now.

Started working after I d/l the driver

http://cms.hannsg.net/onweb.jsp?prod_no=3333333617&webno=33333333:0

indeed, probably the backlight...
Nothing to do about that but repair or replace, sorry...

Normally white screen is panel or Interface board related problem or a supply to panel gone missing.

is there a button switch on front panel to enter the on-screen menu settings? if so, find the proper menu for brightness.