Key board-Problems and Troubleshooting

􀂾 Keys are getting stuck

• Remove the Key cap

• Pour drops of IPA and gently tap 3 or 4 times.

• For long keys, check for proper fixing of the metal link beneath the Key Cap.

􀂾 One Key is not working

• Remove the Key cap

• Pour drops of IPA and gently tap 3 or 4 times.

• Open the Keyboard and check for Dry Soldering and Re-solder the points.

• Check for continuity of all the tracks running through the key which is not working.

• Lay the tracks or jumper the points, if any tracks are found to be cut. (If it is a Membrane

KBD, draw the tracks using a Conductive Ink pen)

• Check the functioning of the Key switch and replace it if found faulty.

􀂾 A group of Keys is not working

• Open the Keyboard and trace the common line for the group of keys which are not

working.

• Check for Dry Soldering and Re-solder those points.

• Check for continuity of all the tracks running through the group of keys which are not

working.

• Lay the tracks or jumper the points, if any tracks are found to be cut.

􀂾 Keyboard is not getting sensed

• Check for loose connections of the KBD connector with the PC and fix it properly.

• Confirm whether the problem is on the PC side or Keyboard side by swapping the

Keyboard in a working PC.

• Open the Keyboard and check the continuity of each wire of the Interface Cable.

• If found open or short, cut the cable at the Keyboard side and check the continuity again.

• If it is OK, solder the cable directly to the Keyboard Connector.

• If the Cable continuity is found OK, still Keyboard is not detecting, the KBD Controller

might be Faulty