Laptop does not open up to my original desktop setting. When laptop is turned on it opens up to a light grey blank screen.

click fn + f1 and change the keyboard light setting via the slider in the settings screen that opened up.

they have a problem with the ribbon cable that goes from the screen case to the base on either the right or left side sometimes needs to be opened up and reseated !!!

check the display settings in Control Panel.

1. open Screen Resolution.
2. make changes here

Windows files are corupt or the hard drive has issues, try and reload operational system if disc is available, have the hardware checked if unable to load.

press fn button and with up-arrow increase brightness ,,, in windows open display settings by right clicking on the desktop (intel or nvidia properties ) acer 4320 could have nvidia or intel ... increase the brightness and the contrast or load the default settings ,,, use external monitor if need ...

The problem is cause due to one of the following: the backlight or the display, check your monitor brightness settings. Sometimes your brightness may accidentally have been all the way turned down, resulting in a blank/dark screen. The monitor controls are on the keyboard, directly above the numeric keys.
Look closely at your laptop's screen if the steps do not restore power to it and if it remains blank. Can you see a faint image on the screen? If so, the backlight may be off due to the LCD "lid close" detector malfunctioning. This malfunction likely happened due to the lid close switch being stuck in the "closed" position even though the lid is open. The switch is located beside the LCD's screen hinges, and tapping the switch a few times should unstick it.
Use an S-Video cable and plug your laptop up to an external monitor, such as your television set. With the laptop and TV hooked up, turn both on and see if your computer's desktop is displayed on the TV. You can also use a fifteen ( 15 )pin monitor desktop monitor by connecting it to the blue fifteen ( 15 ) connector at the side of the laptop if you cannot see anything on screen it is the display problem. If it is, your laptop's display needs to be replaced. If not, your motherboard and/or video subsystem may need to be completely removed and replaced.

Hi...I have had the same problem with my A210 laptop as well over the last year.The problem is sporadic and it would just happen out of the blue.My daughter has the same laptop and the same problem.The screen would go blank ,but you could tell the computer was still functioning somewhat in the background.The only way to fix it was to reboot and if you were working on anything it was lost.I also recently had another similar problem.I had the laptop set to go to sleep when i shut the lid.This worked great for a year or so.When i opened the lid the screen would come back on and i could continue using the computer where i left off.But recently when i opened the lid the screen would come back on for a few seconds then go blank ,just like it did as described in the first problem above.Not sure why as i had not changed any settings on my computer.It happened every time i closed the lid then opened it.A pain as had to reboot to get it back.Here is the fix my friend discovered.Click on the ATI icon in the taskbar and open up the CATALYST CONTROL CENTER.Make sure the advanced view is selected.Now choose "display options".Put a dot in "Detect whenever catalyst control center is opened",and leave the other 2 spots unchecked.( I had a dot in these 2 places ). Now apply the changes and close it out. I have had no problems since doing this with the screen going blank.Not sure why this worked ,other then the computer was getting confused along the way and shut off the screen.Just be aware that if you hook your laptop to a TV you will have to revisit the ATI setting and change them back.....Hope this helps...Dan

Change the settings from the display settings panel. (Right click on the desktop and go to display settings)
You should see 2 monitors graphically represented there. 
You can make the monitor that is greyed out active by right clicking on the monitor, and selecting active.

Go into the diplay properties, under the screen saver tab there is a button marked power, open this. Under one of the tabs there is a section that reads, when I close the lid, under this section set it as never.

Try doing a control+alt+del and the selecting New Task then type explorer. This should bring up your normal windows desktop and icons, etc.