After LCD replacement, the LCD appears dim.
The following ThinkPad systems:
Replace the planar as a fuse has probably blown during the LCD replacement process. Pay close attention to ESD procedures for all repairs involving electronic componets.
Please refer to the following document for correct repair procedures and pictures of the connector:
LCD panel removal and installation - ThinkPad T400s, T410s, T410si
Pictures of the Connector:
Correct LCD cable position after insertion
Closeup of delicate LCD cable connector pins
Closeup of LCD cable connector