DELL E5440 DISPLAY READABLE but WITH Bluish TONE

As shown Above Image password field is SKY BLUE

Board part no. LA-9832P 

Found Pin33 JLVDS1 on MotherBoard Diode value NA  ie. open connection

CONFIRM It by multimeter test Pin9 of 40 pin connector (Panel side open / screen side)

By visual check found Test Point (TP) become moisturized causes this track pad open

Clean and re-solder the TP now all is well

For simple yet informative case study stay login to your own website  ...... .www.EasyMB.in