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820-2915 1/4 fan spin

Chuck60

Chuck60

Member
Ok so Once I put wire connected directly to lvds backlight is on. just extremely dim BKL_PWM=2.5v I would think With that voltage it would have some brightness. But I also might be up against no image on this one :/ As I don’t have a flashing folder. Usb mouse connected and have activity and a chime
 
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2informaticos

2informaticos

Administrator
Staff member
Image should appear before backlight.
If internal video output is not enabled, no reason to search for backlight.
Do you get voltage at pins 2/3 & 4 of J9000?
 
Chuck60

Chuck60

Member
J9000
Pins
2&3 =3.3v
4 = 3.3v
L9010,L9011 have continuity
L9000 has continuity
 
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Chuck60

Chuck60

Member
I wanna say it’s on but leds are very dim it’s not noticeable with lights on. Black not white but barely visible. I made a video but I can’t upload it. I will pop it in a case now see what happens
 
Chuck60

Chuck60

Member
No it won’t boot I have a stage light affect on both screens kind of like when a tv hoes to sleep. I was wondering if maybe this issue is like a lid closed Affect or SMC_LID_R. Issue? Where the screen thinks it’s closed?
 
2informaticos

2informaticos

Administrator
Staff member
"J9000
Pins
2&3 =3.3v"
Means LCD_PWR_EN is present; only possible if SMC_LID signal is correct.

The exact voltage at pins 38-40 of J9000?
Measure with LCD connected, of course.
L9010/11, both good?

Did you check external video?
 
Chuck60

Chuck60

Member
well I checked L9010/11 for continuity and they have continuity so I assume they’re good.
I wont get external video from this unit as dosdudes gmux disables this feature.
I will measure the 38-40 again. Thank you for your help :)
 
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