IBM R31, R30 manual FRU replacement notices, LCD replacement notice, Screw notices

FRU replacement notices

This section contains notices for removal and replacement. Read this section carefully before replacing any FRU.

LCD replacement notice

The TFT LCD for the computer contains many thin-film transistors (TFTs). A small number of missing, discolored, or lighted dots (on all the time) is characteristic of TFT LCD technology, but excessive pixel problems can cause viewing concerns. The LCD should be replaced if the number of missing, discolored, or lighted dots in any background is:

vXGA : 8 or more bright dots, 8 or more dark dots, or a total of 9 or more bright and dark dots.

Screw notices

This computer uses special nylon-coated screws with the following characteristics:

vThey maintain tight connections.

vThey do not easily come loose, even with shock or vibration.

vThey need additional force to tighten.

vThey should be used only once.

Do the following when you service this machine:

vKeep the screw kit (P/N 08K6560) in your tool bag.

vAlways use new screws if you are instructed.

vUse a torque screwdriver if you have one.

Loose screws can cause a reliability problem. The IBM ThinkPad computer addresses this problem with nylon-coated screws. Tighten screws as follows:

vPlastic to plastic

Turn an additional 90 degrees after the screw head touches the surface of the plastic part:

vLogic card to plastic

MT 2656, 2657, 2676 23