My emachines m6811 screen shows a poor quality

A) Replacement LCD screen backlight could be bad.
Happens. Sometimes you get a bad part. (Bad LCD screen assembly, in this case)

LCD screen may not be the correct one.

http://support.gateway.com/s/Mobile/2008/GodzillaFX/2528410R/2528410Rsp2.shtml

http://support.gateway.com/s/Mobile/2008/Godzilla/2528407R/2528407Rmv.shtml

A screen Inverter, and an LCD screen; are a MATCHED unit.

B) Screen Inverter:
May be bad, or the Wrong one

C) You may not have the screen Inverter, connected correctly to the Backlight.
Connections aren't tight.

D) The Display Cable TO LCD screen connection may not be tight, or correctly connected.

I know the display shows graphics, but a poor connection of Display Cable to LCD screen, can make the Backlight dim out.

I'm betting it is a poor connection, or the wrong screen Inverter, or wrong LCD screen.

Regards,
joecoolvette

(Be shame to kick that laptop to the curb. Nice laptop)

The backlight is built into the LCD screen located on the bottom, the new display will include the backlight.

possible problem would be your processor or ram,
try to clean first your ram..

1) Control Panel / Security & Maintenance / Recovery

Hello, Matt.

Sounds like a conflict with your VGA card driver.

From Safe Mode, go to Add/Remove programs and remove anything related to graphics. Go to Device Manager and remove/uninstall any listings for Graphics Adapter.

When you restart, install the drivers from the CD. If the drivers need to be "executed" as a program, cancel out of the driver install and run the drivers program when you get into Windows.

Hope this helps.

http://www.emachines.com/support/product_support.html?cat=Notebooks&subcat=M%20Series&model=M6811
This is the manufacturer driver download page, you may need to update the wifi netwrok card driver, probably the Broadcom file, if you got to the "Control Panel" and goto the system icon and double click, then click on the hardware tab, then deviceManager, and see if any Devices have any "Issuse" (anything except for a "+" sign next to the catagory. then install the corresponding driver.

Two beeps usually indicates a memory problem, try re-seating the RAM. You may need to purchase new RAM.
Good luck.

If you have another pc, network the two and share the cd drive of the other PC

There will be a brightness switch it will be a combination of the fn key and a key with a sun symbol and an up arrow on it (usually the up cursor key) if that doesn't work i'm afraid that your backlight or inverter has died, you can get replacement parts on ebay but if you havent done this sort of repair before it may be better to take it into a shop to do, unless you are still under warantee then the manufacturor has to repair/replace, its a good idea to get everything backed up off your Hard drive first.

double check that its the backlight by pluggin the laptop into an external monitor first as if it is a backlight issue it will display fine externally

hope that helps

Emachines used to use a poor quality power supply made by Bestec, I believe the quality is supposed to have improved in the last few years but inconsidering the number of dead Emachines that wind up in my workshop I doubt it.
The problem you have is that being a poor quality power supply there is a very high risk that it damaged the motherboard when it went out.
If you can borrow a power supply just to test with all the beter BUT be carefull some Emachines are proprietary and the main motherboard plug is not always wired in the standard way.
Check here for a replacement power supply if you can prove your motherboard to be OK.
http://www.affordablesurplus.com/
Have a look on this site for examples of standard and proprietary power supply wiring colours.
http://pinouts.ru/pin_Power.shtml