My dad's XZ Premium 'stopped working' like two months ago, he took it to a random repair shop who opened it and poked a lot of components so there's no warranty anymore they thought it was a bad battery for some reason.

I found the phone still worked but the screen appeared to be broken so I thought i'd fix it for fathers day with a replacement screen.

I installed the replacement screen but it still wouldn't work, then I found that if I boot it or make a screenshot even though I don't see anything the screen does in fact show an EXTREMELY low change in brightness. It's barely visible at all.

So I supposed it wasthe backlight that doesn't work, so I've read about backlight fuse/jumper repairs on the motherboard. I check the backlight fuse with a multimeter, and it appears to work fine. Then I want to proceed to check the display fuse, but I can't seem to find it given it is marked with the L like it was on the xperia z5 i've seen in video tutorials.

The XZ Premium motherboard around display connector:

(you can see the V marked backlight fuse just on the left side of the display connector(long white)

The Z5:

Hopefully I can find it and find that the fuse needs fixing otherwise I won't have a clue what the issue is anymore... ;/ If someone has other suggestions, that would also be highly appreciated.

Thanks in advance.

Edit:

Thanks to Smartfonefix I think I found the issue, visually they already look in bad shape not exactly sure what to test on with these I tried a bit with the diode mode but the numbers don’t say much to me (I do have a working XZ Premium myself to compare values to but I don’t really want to void the warranty on that) though I don’t get a beep on the coil and diode. I’ll try to find out how to confirm it’s either one of these or both but even if it is one I doubt it’s a diy fix. (i think it’s the correct ones that are in the top left/middle-left.

⟐ Commented November 25, 2025 at 8:42 MST

UPDATE:The on board connector for the charging port needs to be replaced or resoldered.

⟐ Answered November 30, 2025 at 12:48 MST

Thanks Tom

I have ordered a USB flex but it doesn't look like it has a microphone on it. After doing some research it look like it is on the motherboard (photo below). How would I unsolder this? Would I need a heat gun?

⟐ Commented June 10, 2020 at 6:29 MST

⟐ Commented November 01, 2017 at 14:55 MST

⟐ Answered June 18, 2020 at 16:16 MST

⟐ Answered August 22, 2019 at 3:13 MST

⟐ Commented March 24, 2019 at 23:53 MST

My phone suddenly stopped working, phone repair people said it needed a new motherboard but they couldnt find a supplier,would anyone know where to get one? also it seems the phone turns on but nothings showing on the screen even though touchscreen is still interactive( i can feel the key pad vibrate when i touch it). Any ideas on what this could be? Thank you!

⟐ Answered August 28, 2018 at 18:33 MST

I held the power button and the Sony screen appeared as normal, but the device again powered off straight away. If I left the charger connected it would go through this loop repeatedly, and also the charging light was erratic - flickering green, flashing red etc. It was the same whether I connected it through a wall socket or to a computer, the Xperia Companion app wouldn’t detect the phone either.

I tried a new charging cable but that didn’t fix it. After a day or two, the Sony screen no longer appeared when I held the power button or connected the charger - instead I got the usual battery icon that appears when the phone is powered off and charging, except rather than there being a charge % and the icon filling with green, there was no % and just a single red line in the icon.

I took the phone apart and replaced the charging port - no change. I then replaced the battery which didn’t fix it, but rather put the phone back in the same state it was when it started having problems initially - repeated Sony screen boot loop.

Would appreciate any suggestions!

⟐ Commented July 17, 2021 at 15:02 MST

my xz premium stop working. It doesn't display anything and doesn't vibrate when I plug in the power cable. The display is totally not functioning at all. So I went to the local repair shop and I was told that the problem was with the power IC issue. They also told me that they don't have the parts. So I went around from shops to shops that sell spare parts. Some of them told me that they have the parts for XZ premium but I wanted to make sure that I am buying correct part number. So could any of you help me to find schematic of XZ premium motherboard or workflow like the one I have uploaded.

Thanks

Not sure how I could have damaged the screen while opening it. I checked all the pins from the screen to the logic board and they all look good.

Help?

I did replacement the LCD Screen of my Sony Xperia XZ Premium but the problem even getting worse. At first before replacing it, the problem only at top of the screen. Maybe around 1-2cm the touch at top screen not working, so i decided to go to smartphone fixing shop to get it fix.

They said to replace the LCD then it replaced. They claimed that the LCD work well until i came to take the phone, i saw myself yes the touch work a couple second before they hand me the phone but then after a couple try they want to show me that it fixed, the touch not even working in the whole LCD. I waited there they tried fix the phone again and try the old LCD but now the old LCD touch not working in whole LCD Screen just like the new one.

Any idea what happened here? If the new LCD is not good/broken then why the old LCD touch not working as well when try to compare? Because at first the old LCD touch working good unless at the top of it.

Need help. Please.

Thanks, Ady.

hello everyone I am repairing the motherboard the phone is dead> the battery is good. short circuits no. . It is possible that the system is damaged Pm8998 - best regards Michal

When I replaced the battery, I have broken this white pin. It is completely detached from the print board. However, the xperia looks working well. Do you know for what this pin work?