[C]Date: Wed, 24 Jul 1996 18:43:56 -0500 (CDT)
From: Peter Barrette 

  If it isn't one thing, it's always another. Having recently replaced 
the infamous right clutch I had hoped to get more use out of my Aero. 
However I managed to drop the damn thing and break the backlight. The LCD 
screen itself is without damage

The backlight in the Aero 4/25 is a small flourescent tube approx. 143mm 
long and 3mm in diameter. It is called a CCFL which stands for Cold 
Cathode Flourescent Light. Mine also has the number 3121 printed on one 
end. I have yet to find a replacement since Compaq only offers the entire 
display assembly. I have, nonetheless, outlined the procedure.

If you know where I can get a replacement please let me know.

The Replacement Procedure:
 
  1. Remove the screen bezel (The FAQ has an excellent description).

  2. The backlight is located in the white plastic rectangle just to 
     the right of the LCD screen. 

  3. Using a small phillips screwdriver, remove the three screws in the  
     white plastic case. Lift the right edge of the plastic panel up and  
     pull to the right to remove it. You should now be able to see a 
     thin, white, plastic film gently folded over. 

  4. Upon unfolding it can be seen that the other side is reflective 
     (like mylar). You should also now be able to see a long, white tube 
     with a white wire coming off of each end. This is the backlight. 

  5. To remove it, you must unplug the wires from the Backlight inverter  
     (the small rectangular board at the base of the screen). 

  6. The wires are also held underneath a small, metal grounding tab 
     that is held down by the display clutch's top screw. 

  7. Remove the screw and the grounding tab and remove the CCFL tube.