[SOLVED]820-2936 no image

[gadgetfix]

L9004 was burnt out. pad was gone. run jumper c9015

now getting 3.28v on pin 2/3/4
also got 12.6v on 21/22

chime screen flashes white for like a split second. external has display.

 

[JohnB8812]

If it flashes white for one second then goes out, is there image with no backlight or just no image period?

 

[gadgetfix]

the backlight is still present but NO image.

 

[JohnB8812]

Tried known good screen?

 

[gadgetfix]

Yerp, definately working lcd

 

[dukefawks]

Backlight cannot be present with 12.6V on the backlight pins. Please confirm...

 

[gadgetfix]

Backlight cannot be present with 12.6V on the backlight pins. Please confirm...

definately something there as its not 100% pitch black. its strange it turns on chimes white screen flash. then its just black.

EDIT: you right- 12.6v when sleeping but when boot and running 25.6v?

 

[JohnB8812]

If the screen is white then goes dark instantly, that sounds like an SMC_LID problem. Honestly post video of what it does that might help

 

[gadgetfix]

here is vid.

 

[gadgetfix]

i checked the components on smc_lid resistor is reading like 97.8k and q5701 looks fine.

 

[Gurmon]

whats voltage on smc_lid ?

 

[gadgetfix]

voltage on smc_lid is 3.42v

 

[dukefawks]

Diode mode on all 6 LVDS lines (pins 8-18)?

 

[gadgetfix]

duke most are reading ~497 with the exception of pin 18 which is 0 i turn over to the over side and one of the probe points which connect to L9080 is completely corroded. could this be the issue? should i run a jumper from pin 18 to L9080?

 

[gadgetfix]

All good it works now jumper worked great.

I cant believe i overlooked a probe point.