Nortel Meridian SL-100 Reference Manual page 53

To install or replace an older model display (NT2K24WA or NT2K25YL) in
the NT2K series phone that does not use the daughter board, follow the steps
in Procedure 2-9. Note that if you are installing the older model display on
an NT2K series M2008 or M2008HF phone, you will need cable P0738600.
The other models allow you to connect the cable from the display module
directly into the mother board on the phone.
Procedure 2-9
Installing an NT2K28AA display without an internal daughter board or
replacing an NT2K24WA or NT2K25YL display module in a phone with an
NT2K28XX
1 Remove the handset. Place the telephone upside down on top of a level, solid
surface covered with soft material or paper to prevent damage to the movable
keys and the telephone face.
2 Disconnect all cords from the telephone.
3 Loosen and remove the two screws from the stand assembly of the telephone.
Unsnap the stand assembly by pressing inward at the back of the stand where
it meets the base then pull upward. Set the stand assembly aside, taking care
not to lose the mounting hardware.
4 Remove the four screws securing the bottom cover of the telephone set to the
top cover.
5 Leaving the screws in place, remove the bottom cover by lifting it upward. Set
the cover aside.
6 Loosen the screws that hold the fillerplate or existing display module.
7
Remove the fillerplate or display module, being careful not to touch the foam in
the speaker housing.
CAUTION
Possible equipment damage
Before handling internal telephone components, you must
discharge static electricity from your hands and tools by
touching any grounded metal surface or conductor.
8 If the telephone is equipped with an MCA, unplug the data cable from the
appropriate jack.
9 The power supply board (if the telephone is equipped with one) is located on
the left side of the telephone. Remove the two small screws from the power
supply board (near the top) and set them aside. Grasp the board firmly on
each side. Carefully work the board loose until released.
Meridian SuperNode MSL-100 Meridian Modular Telephones Reference Manual MSL11
Installation procedures 2-29