Traduciendo paso 10
Verify LCD Assembly Connector is clean, not damaged and connected properly.
Remove the LCD Assembly connector to inspect and assure the LCD Assembly connectors are clean and not damaged. See pg 124, or as noted in the PDF reader as pg 130, of the "thinkpad t40 t40p t41 t41p t42 t42p Maintenance Manual" for more details if needed. This manual is found in the Attached Documents section at the end of this Guide.
Insert and reconnect the LCD Assembly connector making sure the connection is properly seated.