dynabook TECRA A50-J - System Board

If replacing with a new system board, update the DMI information as
described in Chapter 3, Tests and Diagnostics. Also update with the
latest BIOS and EC/KBC as described in Appendix G, BIOS Rewrite
Procedures, and Appendix H, EC/KBC Rewrite Procedures.
When replacing the system board with a new one, the ProductKey
(MBR-DPK) must be written on the system board.
When removing/installing the system board, do not handle with the
handling prohibition area.
CN3270
CN3240
Keyboard Backlight Harness
Keyboard FPC
4.23 System board
4.23.1 Removing the System board
To remove the system board, follow the steps below and refer to Figure 4- 30 to
Figure 4-32.
1. Disconnect the Keyboard FPC from the connector CN3240
and Keyboard Backlight harness from the connector
CN3270 on the System Board (FMERSY*).
Figure 4-30 Removing the system board (1)
2. Disconnect the LCD/Webcam harness from the connector
CN5390 and DC IN harness from the connector CN8001 on the
System Board (FMERSY*).