Editing PowerBook 100 Capacitor Replacement Guide (section)

=== Reach the LCD and inverter ===
# With the display assembly off, remove the four top cover screws, lift off the two clutch plates and slide off the clutch covers. Release the speaker and the interconnect cable cover and remove the top cover. The speaker is soldered to the interconnect cable.<ref name="ss" />
# Pry the brightness and contrast knobs off their shafts. Pry out the two rubber plugs, remove the two bezel screws, pry the bezel from the metal clutch assembly on each side and lift it off.<ref name="ss" />
# Remove the display shield screw and shield, the inverter board screw, the interconnect board screw and the four display screws. Rotate the display forward onto its face, taking care of the boards and cables that come with it, then disconnect the brightness/contrast flex cable, the display flex cable and the lamp cable.<ref name="ss" />
# On reassembly, press the lamp cable wires back into their channels in the housing and fit the brightness/contrast cable with its blue insulator end towards the interconnect board.<ref name="ss" />

Keep solvents away from the backlight's diffuser film and acrylic light guide; owners have stained them with liquid while cleaning the LCD board.<ref name="blob">68kMLA forum thread [https://68kmla.org/bb/threads/powerbook-100-recapped-lcd-and-logic-board-but-screen-is-blobby.50914/ "Powerbook 100 - Recapped LCD and Logic board but screen is 'blobby'"], October 2025. finkmac: the diffuser film and acrylic light guide are sensitive to oils and solvents; 3lectr1cPPC: a stained light guide on a PowerBook 540 could not be cleaned. Community repair report.</ref>