Here is a guide for the positive connection on iPhone 5s charging ways.
Monday, July 31, 2017
iPhone 5s positive ways
Below is the image where you can find the battery positive connections that has a 3.8V. If you have a shorted iPhone 5s unit, you can check all these red colored parts by removing one by one.
How To Fix Samsung Galaxy Grand Neo Plus Can Charge, But Can't Power On
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.
iPhone 5s Switch Ways
Here is a connection of iPhone 5s switch ways.. I personally trace it using zxw tool.
Thursday, July 27, 2017
Repairing iPhone 4 No Power
History: water damage
First thing first, that is basic troubleshooting
1. Open the unit, check if grounded/shorted. Not shorted/grounded. Also check board by visual checking.
2. Replace battery and try to power it on. Still can't power on.
3. Connect usb charger to laptop and see if it connect or asking for usb driver. No reaction.
4. I always do this, remove lcd and connect it again to laptop. Finally it connect! I thought LCD set was damage. but when I replace LCD set, still it doesn't power on.
5. Analyze.... While I'm thinking I notice a heat up on power IC and other neighboring components.
6. What I did is to connect its positive and negative terminal to power supply and found out that output current is not normal when you press power on(with LCD attach)
7. But when powered it on without LCD attach, current output is normal. Aha!
8. I Immediately check the LCD connector ways and here's what I've found:
9. The 2 capacitors are shorted.. Removing these 2 fixed my problem.
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