A) Loose connection of Video Cable to back of LCD screen
B) Loose connection of Video cable to screen Inverter
C) Failing screen Inverter
D) Faulty LCD screen
My money is on a bad connection of the Video Cable.
How does this happen Michelebolya?
This is an example of the Video Cable,http://www.amazon.com/Video-Cable-Latitude-laptop-DC02000HT1L/dp/B0090DV3LS
Click on the photo to enlarge.
The long blue connector to the Left, plugs into the motherboard.
(On the Bottom of the laptop)
It then goes up around the left Hinge, and into the Display Assembly.
[From there the long Yellowish connector on the Right, plugs into the back of the LCD screen.
There is a small cable at bottom, that plugs into one side of the screen Inverter.
Also with this cable, the Wireless Antenna cable is included ]
Just due to normal opening, and closing of the laptop; the Video Cable may become pinched.
This can cause the cable to be pulled on, and loose connections can result.
And/or damage to the Video Cable can result.
Stretched/Broken tiny wires inside the Video Cable.
Suggested method of repair;
1) Remove ALL power. Remove the AC adapter (Charger), and Battery.
2) Remove the bottom of the Base Enclosure.
Dell? -> Base Assembly)http://support.dell.com/support/edocs/systems/late6500/en/sm/html/base.htm#wp1184372
Dell Support > Latitude E6500 Notebook PC > Service Manual > Display > Removing the Display Assembly,http://support.dell.com/support/edocs/systems/late6500/en/sm/html/display.htm#wp1179842
This is a BOTTOM view.
The Video Cable is shown on the Right.
Looking at a Top view the Video Cable is on the Left.
BEFORE you touch ANYTHING, micheleboyla, you need to be wearing an ESD wrist strap.
Electro Static Discharge.
Average cost ranges from $3 to $6.
This is one example,http://www.radioshack.com/product/index.jsp?productId=2103245
Your body carries Static electricity. Static WILL fry out (Short Circuit), the delicate hardware components inside a laptop.
With wearing an ESD wrist strap, and having it's alligator clip attached to a good ground source, your laptop is safe from Static electricity.
Once you have the bottom cover off, the most sensitive hardware component to Static shock; is exposed.
I connect to an unpainted surface, of the metal frame of an open, empty desktop computer case.
(I feel an Anti-Static Mat is unwarranted, and I don't want my wrist connected to the local utility companies ground source)
You can set a large metal serving tray, (Unpainted), on the table you're working on, and connect to it.
Or perhaps a large metal knickknack. (Unpainted)
Connections CANNOT just be visually inspected. You have to Physically see if you can plug the plug in tighter.
First motherboard side.
No? Go on.
Open the Display Assembly.
The plastic frame in front of the LCD screen is the Display Bezel.
From what I can see the Display Assembly does Not need to be removed, in order to remove the Display Bezel.http://support.dell.com/support/edocs/systems/late6500/en/sm/html/display.htm#wp1201557
This means you can pop the Display Bezel off, and have access to the Video Cable small cable, to the screen Inverter. See if this connection is loose.
No? Didn't change anything after you tried plugging it in tighter?
The LCD screen is an assembly. It is composed of layers, and held together in a factory set specific pattern; by a metal Screen Frame.
[Screen Frame also resembles a picture frame ]
Screen Frame screws to the Display Cover, (Top cover of laptop when closed),http://support.dell.com/support/edocs/systems/late6500/en/sm/html/display.htm#wp1202034
This means you may be able to lean the top if the LCD screen/Screen Frame forward, and be able to access the Video Cable connection of the LCD screen.
Won't have to remove Display Assembly to access, and after checking cable connection for tightness, can prop LCD screen against Display Cover, and see if that repaired it; before reassembling laptop.
See where he's got the LCD screen tilted in Step 6 photo?
No? Not enough tilt, to access LCD screen connection of Video Cable?
Will the LCD screen lay down as shown in Step 7 photo?
W-A-T-C-H the Video Cable's length. May NOT be able to do this.
If Video Cable connects at the Middle of the LCD screen,
this may = No.
In that case ease the LCD screen forward, and rest on Palm Rest Cover above Keyboard. Watch the length of the Video Cable. See if you can plug Video Cable in tighter, to the back of the LCD screen.
Then you need to perform a continuity test on the Video Cable.
Multimeter set to OHM's (1K), and check every wire in the Video Cable.
Also have an assistant gently wiggle the cable, and see if you get an intermittent reading on the multimeter. Indicates broken wire. Replace.
Take the Video Cable down to the nearest small computer repair shop, and have the resident tech check it for continuity. Should only be a couple of bucks.
Video Cable good?
Next in line is the screen Inverter.
However to test a screen Inverter requires a sensitive multimeter.
Read fairly expensive,http://www.fonerbooks.com/test.htm
A) The above,
B) Ease of access, (Just pop the Display Bezel off),
C) Low cost
Most just replace it. One example,http://www.parts-people.com/index.php?action=item&id=5896
Let's try that again,http://www.ebay.com/itm/Dell-Latitude-E6500-LCD-Inverter-Board-H024P-/130819120437?pt=LH_DefaultDomain_0&hash=item1e756d5d35
Then the problem is the LCD screen.
Seem like a bit of trouble?
Better to re-connect a Video Cable, or buy one, or a screen Inverter; than replace an LCD screen, and find that wasn't the problem at all.http://www.laptopreplacementscreen.com/dell-laptop-replacement-lcd-screen/dell-latitude-e6500-replacement-lcd-led-screen-15-4-laptop-screen-hd-wxga/
For additional questions please post in a Comment.
[The Display Bezel is made of a space-age plastic, usually. Pretty tough stuff.
However it CAN be broken.
The Display Bezel has Tabs on it, surrounding the inside perimeter.
These snap into matching Latches, on the Display Cover.
The thick guitar pick to start with, is an excellent method.
However somewhere in there, you're going to have to slip a fingertip under the Display Bezel; and your fingernails will be against the LCD screen.
This = No
I lay the Display Assembly back as far as I can.
I then suggest you cut a piece of cereal box; or thick construction paper, or etc; to fit as close as you can, to the inside edges of the Display Bezel.
Protects the LCD screen from your fingernails.
The INSIDE edge of the Display Bezel, on the Right side/Middle; is flexed up first.
Can't get a fingernail under the inside edge?
Move over a little. You are at a Tab/Latch.
Pop one Tab/Latch loose, move over going DOWN the Right side.
Snap! Almost sounds like you are breaking something.
(DO support that small area of the Display Bezel, on BOTH sides, though; when popping it loose!)
Go around the Bottom, and come up the Left side.
Snap, snap, snap...................
By the time you get most of the way, the Display Bezel should pop loose.
Line the Tabs/Latches back up, and snap them into place, one by one; when reinstalling the Display Bezel ]