XZ premium charges after putting pressure

I suspect the board to board connector on the motherboard had a dry joint and by applying presure on the back and front of the phone, just above the charging port, presses the connect joint down onto the motherboard and it charges. Only problem with this is a) the dry joint will heat up especially if you try to fast charge the phone because of the amps being put through the circuit and b) the joint will become increasingly worse until even pressing down on the phone won’t get around the problem

For anyone else having the same problem, first change the charing port to rule out the USB connector and then if the same symptons persist, you probably need the BtB connector replacing or at least re-soldering, I personally would replace it so you have new charing port and a new BtB connector

Hi. Good post. I have had exactly the same issue as described. Phone would only charge when pressure applied. Replaced USB port and flex cable and this did not fix the problem.

Looked at the board to board connector and it was indeed loose on the left hand side (nearer to speaker).

Phone stopped charging all together in end so removed the old board connector. Have ordered a replacement connector but i have two queries:

1) Does anybody have a guide/overview of BTB repairs for an XZ premium

2) Does anybody have a picture of a motherboard with no board connector fitted? I just want to make sure I have not damaged the main port or left any of the old connector on the main board prior to fitting the new BTB.

Thanks

Oh wow, just reading all this now, and wished this one had come up in my searches for answers for my phone previous to me taking to phone technician!

I had exactly the same experience as Zayn. The technician replaced the charging port, he had problems getting the phone apart and broke the screen ( had to wait again for parts as live in a regional area ) he paid for screen but after having trouble with another repair on a previous Sony of mine he has decided not to repair any Sony’s any more! So I am exactly in the same place, with phone slowly dying. I have ordered a new phone as I need it for my business asap. Will contact Sony to find out any experienced with Sony repair people as I love this phone. Any recommendations for Australia?

Jupp, that seems to be it, gotta fetch either a hot air station or just a soldering iron. (the back is off and I’m applying pressure onto the plastic cover directly above the C-port/BtB-port connector on the motherboard)

Could it be so simple that the USB-flex cable isn’t plugged in properly to the motherboard?

So when you put some good amount of pressure at the bottom of the phone it gets a good enough connection to make it charge.

From your question i’m not sure if you want to repair the device yourself or are just asking to see if it’s repairable.

If what i’m saying is true you would only have to remove the back cover/glass from the phone, which is glued.

Then remove a few screws , remove plastic bracket and then plug in the USB-port connector to the motherboard.

Hi, thanks for the solution. I va the same issue even after replacing charging port, then found it works when applying pressure on the cable connect the main board.