Basic Hardware Tips And Tricks

Thursday, September 1, 2016

Repairing Shorted Samsung SM-T231(No Power)

shortedboard 8:08:00 PM No Power, Samsung SM-T231, shorted 9 comments

When I am repairing a unit with shorted board, I always connect it to power supply. There are 3 things I must check. (1) If it is full shorted. That the power supply will show zero reading. (2) If it is half-short(that's what i call it). That the power supply will not go to zero reading but it has high ampere reading. (3) If it has s small short. That the power supply will not go to zero reading but it has very low ampere reading. These are my own description.

I repaired this Samsung tablet with model number SM-T231 in just a few minutes. I only got hard time in dismantling the tablet because its very hard.

And after dismantling the tablet and found out that its board has a shorted board. I checked it on my analog tester and it has zero reading.

I connected my digital power supply alligator clip positive to the positive terminal of the tablet, with respect to negative. It has a high ampere rating. And if it has high ampere rating what I used to do it to put my fingers on each of the components on the board, most especially the capacitors. You know why? The deffective component/s will get heat! And like what I have expected, one capacitor heats up. I quicktly determine what component is deffective. Just see the picture below. As I have expected, CAPACITOR!

After removing the capacitor, shorted reading is gone. Ans the tablet can power on now. :)

Repairing iPhone 6S Plus No Light On LCD

shortedboard 4:19:00 PM iPhone 6S Plus, No Light No comments

If there's no light on LCD, most probably there;s no supply on LED. You must get a supply from a capacitor to make the LED light.

right

left

All credits to my friend abe05 :)

O Plus Air Charging Port

shortedboard 12:08:00 PM charging port, O Plus, O Plus Air No comments

This is an O Plus Air board. You can see the charging port design. Very easy and safe to replace whenever your charging port has been damaged.

Repairing MyPhone Infinity Not Charging

shortedboard 3:06:00 PM charging port, MyPhone, MyPhone Infinity, Not Charging 3 comments

MyPhone Infinity's charging port was damage, and all the pattern in the board was all gone. The very first thing to do this is to find the charge positive line.

Below is the image of the positive line. Make a jumper on the charging port with respect to ground. The second image indicates that the positive line was correct, and it show success charging.

Finally re-assemble the unit and you're done

Samsung Galaxy Note II N7100 Clone Not Charging

shortedboard 5:17:00 PM charging port, Not Charging, Samsung Galaxy Note II N7100 Clone No comments

I have a customer here complaining that her Samsung Galaxy Note II N7100 Clone doesn't detect the charger. Or simple if she insert her charging there's no reaction, in other words it doesn't charge. I disassemble the unit and found out that the charging post has been damage and separated from the board. Not only that, the three connections has been peeled off as shown in the image below. But luckily 2 connectios are left, the positive on the left and negative on the right.

In this case I use to put a jumper on the positive pin of the charging port and solder it on the positive connaction on the board. This is to ensure a better and sure connection of the positive :)

Now solder the charging port. Be sure you that have a good soldering skills:) After that measure the charge output voltage from the battery terminal. It must be not lower than 3.8Volts and not higher than 5Volts.

Finally re-assemble the unit ang you're done!

OPPO R831K Can't Power On

shortedboard 12:50:00 PM OPPO, OPPO R831K 1 comment

I have now this OPPO R831K, the customer said it doesn't powered on, but it can be charge. The first things that comes to my mind is a faulty switch. I dismantle the unit. Check the flax switch most especially the membrane. Maybe there's a corrosion at the bottom of the membrane. But there's no corrosion. Next step is connection checking. I checked the connection from both side of the switch going to the 2 connection that will be connected to the board. I found out that the other connection is open. So what are we going to do with that? Just apply a jumper, and problem will be solve.

Samsung Galaxy Note 8.0 N5100 Not Charging

shortedboard 11:04:00 AM charging port, N5100, Samsung Galaxy Note 8.0 N5100 No comments

Most common issue to almost all samsung units when it comes to not charging problem is no other that the charging port. replacing the charging port will solve the problem. Below is an images of Samsung Galaxy Note 8.0 N5100 charging post replacement.

First measure the voltage output from battery terminal. It must be not lower than 3.8 volts, ang not higher than 5 volts. On this case, the Samsung Galaxy Note 8.0 N5100 has 0 volt output. In most cases, the charging port is damage.

Now dismantle the charging flex board, and remove the damage charging port. Apple first flux on the charging port body, then resolder the pins and both sides. Then gently remove the charging port by using your hot air.

Instead of holding the charging port, use an scrapt usb charging cable to hold your charging port while soldering it. Avoid shorting the pins. After soldering measure the charging output voltage from the battery terminal. And if it measures 3.8 volts and up, then congrats you are finish with your work! Re-assemble the unit and test it if it's now charging.