Bright line or dot displayed due to display unit is bad.
Cause:
Display unit is bad due to power surge that ruined the display unit.
Solution:
Ensure display unit and video adapter card match. Disconnect data and power cables. Switch display units and reconnect cables. Turn on display unit and computer and check for proper operation.
1) Ensure new display unit matches video adapter card capabilities.
NOTE: The display unit and video adapter card (installed inside the computer) MUST match in type (e.g., EGA, VGA, SVGA) and resolution (e.g., 640 by 480). If upgrading display unit, video card should be upgraded also.
2) (Optional) Run hardware utility (e.g., Microsoft Diagnostics (MSD)) to determine type of current video adapter card. To run Microsoft Diagnostics:
a) Enter MSD at DOS prompt (brings up MSD main screen).
b) Press 'V' or choose 'Video...' to display Video information on video adapter card and display unit.
c) Check manual of new display to determine if it will work properly with existing video adapter card.
3) Save work files, exit all applications and turn computer off.
4) (Optional) If also installing a video adapter card, install the video adapter card first.
5) Unplug display unit's power cable from the surge protector or wall socket.
6) Use a small flat-tip screwdriver to loosen screws holding the video data cable onto connector on back of computer.
TIP: Trace the video data cable from the back of the display unit to the back of the computer.
7) Note the orientation of the plug to the socket. Grasp the video cable plug and pull it straight out of the socket.
CAUTION: Forcing the plug into the socket could damage connector pins or socket.
8) Move old display unit from desk.
9) Carefully unpack the new display unit and remove all packing materials.
10) If the display unit base is detached, position the display unit upside down on the desk or a sturdy surface and install the display base (following accompanying assembly instructions).
11) Set new the display unit right-side up near computer (ensure cables will reach).
12) Connect data cable to video card socket on the back of the computer.
a) Locate same 15-pin socket the old video cable was removed from.
b) Orient the plug so that it matches the socket.
c) Insert the plug into the video card socket until it is firmly seated.
NOTE: DO NOT force it. If the plug does not fit, check plug orientation (it fits only one way) and ensure the correct socket is being used.
d) Tighten the securing screws using the small flat-tip screwdriver.
e) If video cable is not permanently attached to display unit, attach it, repeating Steps 12)a) through 12)d).
13) Plug the display unit power cable into both the display unit and the surge protector or wall.
14) Position the display unit where desired (leave plenty of slack in cables for minor adjustments).
15) Turn on the display unit (ensure operation light on display unit comes on. (If light does not come on, check power cable connections.
16) Turn on the computer.
17) Watch display unit for familiar information during bootup.
18) If display unit is on and nothing appears on the display, check that the video cable is connected securely.
19) Adjust the video controls (contrast, brightness, positioning) to desired levels (consult owner manual for location and instructions).
NOTE: For future reference, ensure the display unit (and computer) are plugged into a reliable surge protector to protect equipment against damaging power surges.
