Asus LCD BL on/off

jasko_jacker

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Join Date: Oct 2014

Posts: 1137

Country: italy
#1

Asus LCD BL on/off

06-18-2020, 05:52 AM

Asus X302LA:

With AC (with or without BATT) the LCD BL BACK LIGHT is ON
If I remove the AC adapter the lcd go off but the system remain on

AC+BATT BATT
L_BRIGHTNESS_C Y Y
BL_EN_C Y Y
+3V_EDP Y Y
+LED_VCC_INV 19V 7.9V

BIOS reprogrammed, EC no reprogrammed
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mielta

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Join Date: Apr 2015

Posts: 368

Country: Germany
#2

06-18-2020, 07:15 AM

Re: Asus LCD BL on/off

Hi
Try another display to Test
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caspian

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Join Date: Oct 2015

Posts: 1589

Country: Laptop
#3

06-19-2020, 12:58 AM

Re: Asus LCD BL on/off

measure +LED_VCC_INV on a healthy laptop when power is provided by battery only.
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RethoricalCheese

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Join Date: Mar 2013

Posts: 1518

Country: Estonia
#4

06-19-2020, 02:00 AM

Re: Asus LCD BL on/off

On some other Asus models, the faulty component is a coil on LCD panel board. So either changing that or LCD panel should fix this issue.
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jasko_jacker

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Join Date: Oct 2014

Posts: 1137

Country: italy
#5

06-19-2020, 06:09 AM

Re: Asus LCD BL on/off

thanks,
you reminded me of a similar problem a few years ago.
I had solved it by changing the coil.
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frica

Member

Join Date: Nov 2017

Posts: 37

Country: Spain
#6

06-28-2020, 03:22 AM

Re: Asus LCD BL on/off

+1
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Asus LCD BL on/off

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