Backlight question


New member
In Quanta R13 board I have external video, and all works ok.
But on lvds screen I have only backlight and no video. Already tried new screen and new lvds cable. Also convert this board to UMA and still the same.
If I have backlight does it mean GPU or CPU video is enable already and this mean some lvds problem?


New member
No Title

In diode mode all TX lines are 0.714

Check image. You can see how image is devided. Suspect PCH?


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New member
Original display only backlight, no video.
Other screen 17.3 LED is the same as at the picture.


Resolution is being set wrong. Could be an issue with the EDID data/power lines. Pins 3 4 and 5 are for that. Also messing with UMA/DIS could've fucked this. Make things like they were.


New member
Before messing with uma/dis I had all the same. I just convert to uma to check if this is gpu problem.
I inspect lvds connector and found pin3 broken. Meybe it touch pin 2 or 4 I dont know. Replaced lvds connector and same problem.