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How To Repair Asus Nexus 7 (2013) Not Charging
A customer brought in his Asus Nexus tablet that had a charging issue. He stated that his kids would grab it off the charger, pulling the cable at different angles. This resulted in a distorted charging port and this in turn would not create a good connection onto the terminals.
Therefore the charging was inconsistent. Sometimes the customer would leave it on charge all night only to find that it had not charged. He was frustrated!
The Nexus is fairly easy to remove the back cover and access the circuit boards. You can simply run your fingernail around the edge to release the clips that hold it in place.
After connecting the charging cable to the tablet, a wiggle test was carried out. Not only was it clear from the looseness of the cable in the port, but also when connected to the charger, the state of charge would constantly change with every little wiggle.
After close inspection of the port, it was clear that the outer frame was distorted. This was due to his kids pulling the cable from tablet roughly rather than holding the tablet and carefully removing the cable.
After research on the internet, some people had found success in trying to reshape the frame and therefore reapply pressure to the connections. I had nothing to lose, so I used pointy nose pliers to reshape the frame. This seemed to improve the connection, but not to the stage where I felt confident in the repair.
There was no other choice but to replace the charging port if I wanted to do the repair correctly.
The port itself was very cheap and the repair not too hard. The hardest part was getting enough heat into the outer connections for it to release from the circuit board. For future similar repairs, Robert Calk (thanks Robert!) suggested I use ‘Chip Quik’, which I had not heard of before, but will definitely invest in.
After disconnecting the battery, I started removing the port. Another helpful suggestion I found was to physically cut the terminals off the back of the port. Although this might sound strange, the logic behind it is sound. By cutting the terminals with a knife, the port is no longer connected to the circuit board and therefore no damage can be done to the board trace when removing the port from the board. This worked well and after removal of the port, further removal of the terminals still attached to the board was easy. Obviously, you would want to ensure that there is no circuitry that could be damaged when using this method. In this case, the terminals hung over an empty space, so there was no risk of damage.
With the old port removed, old solder removed, all areas fluxed and tinned, I was able to fit the new port. It sat into place nicely, although it did take some time and persistence to completely solder into place.
It is one thing to solder a component into place and another to be sure that the repair is done correctly. For this I use a 300X digital microscope. After first inspection, I felt that one of the connections needed to be resoldered.
After resoldering and inspection, it was time to reconnect the battery and test the charging system. Another wiggle test was carried out and this time the tablet continued to charge with no intermittent fault.
I was able to hand back a fully charged and successfully repaired tablet to the customer, with one word of advice – ‘keep the kids away from the tablet’!
If you are interested in this repair, you can see a video on my channel following the link below.
This article was prepared for you by Mark Rabone from Australia.
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Note: You can check out his previous repair article below: