Here's a Samsung Galaxy Grand Neo Plus GT-i9060 from my customer. He said that it normally charge, but it can't be on. Basically it's a power switch ways problem or the switch alone. Let's check the switch.
After dismantling the unit I found that its switch flex is clean, no trace of dirt or corrosion. I suspected a rust membrane :) But first I check the switch connection by shorting the positive and negative switch connection. It's good.
What I need next is to check the switch flex's membrane. And as I have expected, the membrane is rusty as seen in the images below. Just clean it and you are done.
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