Compaq cq 40 power on white display
Posted: Tue Apr 11, 2017 12:33 pm
checked in external display ok but internal white display coming
checked with new lcd with cable but same issue
then checked in lvds conector found 18v ok
but lcd_vdd not present pin 7,9,11
which is coming from q7 transitor of pin 1
q7 pin 3 have 3.3vs and pin1 have no volage which is called lcdvdd voltage
lcd_vdd voltage is missing
change the q7 transitor and checked display working fine
checked with new lcd with cable but same issue
then checked in lvds conector found 18v ok
but lcd_vdd not present pin 7,9,11
which is coming from q7 transitor of pin 1
q7 pin 3 have 3.3vs and pin1 have no volage which is called lcdvdd voltage
lcd_vdd voltage is missing
change the q7 transitor and checked display working fine