cq 40 power on but white display issue

[skbasir]

cq 40 power on white display issue

board lal50-la4101p

dignosis

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 lcdvdd 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

lcdvdd voltage is missing

resulation

chane the q7 transitor and checked display working fine

[shlnarang]

i had a same problem solved it in same way

[manikodai]

Yes same way

[ Post made via Android ]

[gaurav]

Nice job

[ Post made via iPhone ]

[servis jaya]

cq 40 power on white display issue

board lal50-la4101p

dignosis

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 lcdvdd 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

lcdvdd voltage is missing

resulation

chane the q7 transitor and checked display working fine

Goog Info...Thanks Master..

[vishalhegade]

Samsung r507 laptop white screen problem

[vishalhegade]

Samsung r507 laptop white screen problem