Problem while trying to replace a LED on Xarmor U9BL

[buihongduc132]

Here is my situation:
I have 2 keyboard U9BL and it both have some LED dead and I come up with a plan to replace those led.

Let say I have the keyboard name A and B.

Thing goes after I put another LED in the A keyboard, I don't know if I did something wrong, but all the led of that keyboard is off no matter I try to increase the light level. I thought maybe those LED are dead so I want to test it by taking 1 good LED from the A keyboard and put it in the B keyboard and that LED is still fine. I try to test 2 more LED from A and all of them are fine. Now, the B keyboard is ok but the A keyboard is still can't turn on those LED.

So the problem is that I don't know what is the problem with my A keyboard. I plug in and test all the key, it's fine. Everything is fine except the LED doesn't turn on. I need you guys to tell me any possibility that is happening to my keyboard and I will try to test that possibility and if it's it, I'll try to fix that later. The priority task now is determine the target, after that I'll have a strategy to eliminate the target

Sorry for my bad English, it's not my mother tongue.

[Vierax]

Welcome guy-who-need-a-multimeter

[buihongduc132]

I don't even know how to use these.
This is the first time I do the electric thing and it is some how 50% successful
BTW, what is this thing call in English ?
http://d2.violet.vn/uploads/resources/183/mohan.jpg

[Icarium]

That's a soldering iron. You use it to solder.

[Vierax]

I don't even know how to use these.

Then you really should learn some basics in electricity and electronic before playing with it because you risk to seriously injure your keyboards, your computer and yourself.
Would you open the hood of your car without any knowledge in mechanic ? I doubt it.

So you have two options : learning to do it yourself (cheaper but takes time) or ask someone to do it for you (not always free)

You're welcome.

Sorry for my bad English, it's not my mother tongue.

Last advice : The three important words in English are "Hello" "Please" and "Thank You", all the rest can be forgiven. So the next time don't forget Politeness

[buihongduc132]

That's a soldering iron. You use it to solder.

Thank you for telling me that

Then you really should learn some basics in electricity and electronic before playing with it because you risk to seriously injure your keyboards, your computer and yourself.
Would you open the hood of your car without any knowledge in mechanic ? I doubt it.
So you have two options : learning to do it yourself (cheaper but takes time) or ask someone to do it for you (not always free)
You're welcome.

Thanks for those advices Vierax Maybe I'll have to try to learn some of these. It might be useful for me later
Atm, I will leave the A keyboard there and try to sell the B keyboard and then I'll use the A keyboard because I don't even need the LED anyway. I want to fix the LED so that the keyboard can be sell with higher price

I don't know how long the LED from others keyboard last. But Xarmor got a really big issue with those LED (1 LED dead on the first month. Another dimmer after a year. After that 1 week, 1 gone). Anyway, I still love the design,feature of iOne, Qpad, Max keyboard most. Can't find another keyboard suit me more than those one

Last advice : The three important words in English are "Hello" "Please" and "Thank You", all the rest can be forgiven. So the next time don't forget Politeness

I think "Sorry" maybe count as 1 of those important words
BTW, thanks a lot

[Ascaii]

If all LEDS are out it sounds more like a PCB issue. You will definitely need a multimeter to see if the circuit for the LEDS is broken somewhere...one broken trace can take the netire led circuit down.

[buihongduc132]

Thanks for giving me another possibility Ascaii
I'll try it later, after I learn how to use a multimeter