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The Asus X555L is a low budget laptop that came out in May of 2015. The model depicted in these guides is X555LA-SI305041, an Intel Core i3 laptop designed to be affordable for consumers. Similar model numbers: X555LB, X555LD, X555LF, X555LI, X555LJ, X555LN, and X555LP

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LED backlight issue: no backlight on battery. Backlight works on adapt

Hello, diagnosing a strange issue here. Laptop works fine plugged in. When disconnected from ac adapter the laptop works but the screen goes very dark as in the backlight just quits. System still works fine. Connect the adapter back and the backlight Comes on. Tried all windows settings but this issue happens in bios as well. The only thing I can think of is the battery is at fault as I read that in dell XPS series the backlight power is fed straight from the battery. Currently waiting for a new battery. Anyone else have similar issue?

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I have the same issue with my ASUS X555LA. I have tried reinstalling drivers, changing the power modes and even went as far as doing a factory reset on the Laptop. Issue still remains...

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Hi, I’ve the exact same problem on this model, I’ve replaced the battery but nothing changed.

It seems that several person are experiencing the same issue and suggest to change the screen.

Did you managed to solve the problem ?

Thanks in advance for your help or anyone else’s

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I have the same problem on my x555l but since it seems like fixing it would include replacing stuff and my computer already is not very good probably will just deal with it

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Same problem here, X555LD. On BIOS screen, the backlight only works with charger conected. Its a display problem?

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Hello. I have same problem with an ASUS F555L It appears to be a known but yet unsolved problem, looking at the comments. The answer from James seems a bit difficult to be done. If i understand it in a better way, the motherboard has some faulty components... I have also changed the battery without change to the problem.

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It’s not the battery issue or the software. It’s the main bord if the display, very common issue with Asus and Acer Touch Screen Display. If you want to fix this you have to replace the diode and the coil from the display main board. Some times the led driver IC or the resistor from the IC

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Hi,

...replace the diode and the coil from the display main board. ..

Have you a image showing that please ?

Thanks!

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I've done some research and the charging circuit is supposed to supply 12v to charge the battery. With the battery out, I have 12v at the charging circuit mosfet but as soon I connect the battery, it drops to 8v. That makes me suspect the battery is faulty but it can be also something in the panel circuit. At the monitor connector I have 19v with charger, and 8v with battery. I used a power supply to inject 12v with the battery connected and the screen backlight started working. If I take out the 12v supply, it drops again to 8v and turn off the backlight. As I see it, a “faulty" battery could be forcing the 12v charging circuit to drop to the battery voltage. With the battery connected and the power supply at 12v at the battery connector, It draws around 3,5amps only at that point meaning either the battery is faulty or I have a short somewhere else, probably at the panel circuit. It's too much amps….if I solve this problem I'll post the solution here.

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any luck with that solution?

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Guess nothing)

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what is the part number for the Diode and where can I get it?

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