1. mrsmobbins101's Avatar
    Hi there,
    While replacing my LCD I fried the mother board power button pin. I worked for about a week then stopped. When the phone died I have no way of turning it on. The screen 100% works . I tried all types of cominations of plugging my phone in while pushing buttons etc and nothing. Does anyone know a way I can turn it on. Also. How abou getting everything off the phone and buying a new mother board??
    09-06-2016 07:27 AM
  2. Mooserman15's Avatar
    What do you mean by "Fried the motherboard power button pin?" I can't help you unless I know what you mean.
    09-06-2016 09:25 AM
  3. mrsmobbins101's Avatar
    When I replaced the screen I used the two tips of the tweezers to touch the 2 pins where the power button strip meets the circuit board. right there it shorted and there is a black mark on the board where it burned up. Does that make sense?
    09-06-2016 10:01 AM
  4. mrsmobbins101's Avatar
    I can try and get a picture of it.
    09-06-2016 10:02 AM
  5. mrsmobbins101's Avatar
    let me know what you think
    09-06-2016 10:33 AM
  6. mrsmobbins101's Avatar
    09-06-2016 10:39 AM
  7. Mooserman15's Avatar
    Yeah, you destroyed that part of the board. Let me explain how I think this happened. The button is a DPST, NO, non-sticky, press switch. Think of it as two switches in one, but they both have the same boolean state (That is, both are on, or both are off. You cannot have a situation where one is on and one is off). Now, imagine this: Your phone's battery goes direct to the power button, along with other components. When you press the button, two connections are completed, allowing energy to flow to the component's control leads. It is really much more complicated, but this is a simple explanation. Two paths are needed, because some components are active low (they turn on when a certain lead is grounded), and others are active high (they turn on when a certain lead is connected to VCC). Your motherboard burned because you shorted out the anode and cathode wires and caused a dangerously high amount of current. Your phone isn't going to turn on again. And you are lucky it did not explode. Next time, use plastic or wooden tools, remove the battery as soon as you can, and never mess with any irrelevant component.
    09-21-2016 09:53 PM

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