Hello everyone,
I am not an expert on hardware, but I do my best and I'm here to learn so please be patient, every little step is my first step in this.
I have trouble with my laptop, motherboard model k52jr, LCD led screen model lp156wh2. I have isolated the problem to the backlight, computer works perfectly with external monitor plugged in, the native screen works except for the backlight and I can see the desktop if I shine light on screen.
I did some research and find out about multimeters, how they works, what they do, so I bought one at a fair price and started doing some tests.
I downloaded the specs for my screen, but I was unable to take measurements on the 40 pins on the back of the screen, everything is simply too small, so I had no idea which pin receives what. I checked the screen plug on the motherboard instead, but I counted only 30 pins on it. Anyway, a couple of them reported 19.4 volts (I connected one end of the multimeter to the ground), so I guess the motherboard is doing its job.
I checked voltages on the back of the screen then, i found an F1 and an F2 fuse. They passed continuity but when the screen was plugged in they measured 19.4 volts instead of the 32 written on the board. I check VLED and VLED_OUT and they both get 19.1-19.3v.
At this point I don't know how to isolate the problem a little more and get closer to the solution, I am aware that i probably made it simpler than it is, but that's precisely why I'm asking for your help.
I suspect it might be the led strip itself, since everything seems powered on, but i have no way to test them directly.
Any kind of insight is very welcome, I attached some pictures if you wanna take a look.
Thanks a lot guys
I am not an expert on hardware, but I do my best and I'm here to learn so please be patient, every little step is my first step in this.
I have trouble with my laptop, motherboard model k52jr, LCD led screen model lp156wh2. I have isolated the problem to the backlight, computer works perfectly with external monitor plugged in, the native screen works except for the backlight and I can see the desktop if I shine light on screen.
I did some research and find out about multimeters, how they works, what they do, so I bought one at a fair price and started doing some tests.
I downloaded the specs for my screen, but I was unable to take measurements on the 40 pins on the back of the screen, everything is simply too small, so I had no idea which pin receives what. I checked the screen plug on the motherboard instead, but I counted only 30 pins on it. Anyway, a couple of them reported 19.4 volts (I connected one end of the multimeter to the ground), so I guess the motherboard is doing its job.
I checked voltages on the back of the screen then, i found an F1 and an F2 fuse. They passed continuity but when the screen was plugged in they measured 19.4 volts instead of the 32 written on the board. I check VLED and VLED_OUT and they both get 19.1-19.3v.
At this point I don't know how to isolate the problem a little more and get closer to the solution, I am aware that i probably made it simpler than it is, but that's precisely why I'm asking for your help.
I suspect it might be the led strip itself, since everything seems powered on, but i have no way to test them directly.
Any kind of insight is very welcome, I attached some pictures if you wanna take a look.
Thanks a lot guys
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