Asus X555LD Rev. 2.0 no screen on internal

[Techtiger]

Re: Asus X555LD Rev. 2.0 no screen on internal

not sure but i think it's you R4504 is not giving BL EN signel to R4504
just near you have a dioe D4501 pin 3 is BL EN signel pin 1 connect with R4541 you should get BL EN signel hope you can trace it

[Techtiger]

Re: Asus X555LD Rev. 2.0 no screen on internal

can you test D4501 pin 3 BL EN
pin 1 is connect to R4541 you shoul get BL EN signel there
test R2538 i think R4530 is bad hope you can trace it

[Conste]

Re: Asus X555LD Rev. 2.0 no screen on internal

voltage in
pin 2.3.4.21.27.36.38.39.40

one of this components short
C4517 0V on both
C4512 0V on both
SL 4504 0V
R4530 0V on both
test with out power resistance to gnd multimete

Pin2: 0V
Pin3: 0V
Pin4: 3,26V
Pin21: 3.26V
Pin27: 3,26V
Pin36: 0V
Pin38: 19,16V
Pin39: 19,16V
Pin40: 19,16V

C4517:
Pin1 0,8 ohms
Pin2: 19,2 kohms

C4512:
Pin1: 19,2 kohms
Pin2: 0,8 ohms

SL4504:
19,2 kohms

R4530:
Pin1: 19,2 kohms
Pin2: 20,6 kohms

[Conste]

Re: Asus X555LD Rev. 2.0 no screen on internal

can you test D4501 pin 3 BL EN
pin 1 is connect to R4541 you shoul get BL EN signel there
test R2538 i think R4530 is bad hope you can trace it

D4501 Pin3 is 0V. I will check R2538 later

[Techtiger]

Re: Asus X555LD Rev. 2.0 no screen on internal

Check voltage U4501 pin 21 3.3V BL EN

[Conste]

Re: Asus X555LD Rev. 2.0 no screen on internal

0V, is U4501 bad?

[Techtiger]

Re: Asus X555LD Rev. 2.0 no screen on internal

That is BAD

[Conste]

Re: Asus X555LD Rev. 2.0 no screen on internal

So put a new DP to LVDS Converter Chip in?