LG G4 USB is not recognised, battery shows constantly 80% on the UI, IMEI is null

Is there any hope for that? I can not install any image with USB connection like that. I removed the battery for minutes, I try to lift up the small "tongue" from the USB female plug... still no connection.

If the USB was working which image would I use with LG Tool 2014 if I'm European?

Thank you in advance,
Dimitris

usb not recognised

I am having Huawei Ascend Mate 7 mobile phone.
Few days back, phone charging got very very slow. It takes 10 hours to completely charge the phone. I thought it might be due to data cable. I buyed new one but same problem.
Then I connected my mobile to pc, then it showed USB not recognised.
I thought to reflash the software but for that stock recovery is required which can be flashed only with data cable but data cable is not working.
Then I tried charging my phone with a charging cable with only 2 wires. Now, the phone takes 5 hours to completely charge the phone.
Then I thought it might be due to faulty charging port. I ordered new usb flex cable spare part from aliexpress and got it replaced . But still the same problems . Slow charging, usb not recognised

I am also attaching images of flex cable, charging cables
Please help me know what could be issue and any solution to this?
Is there anyway to flash stock recovery without data cable

Attached Thumbnails

 


 

ADB/MTP/Fastboot not recognised

First off, I run linux. This isn't a problem of drivers (at least it shouldn't be).

I've had Slim 9.0 on my tablet for what seems like forever. I haven't needed to plug it into a PC for over a year. Couple months ago I wanted to change what I had installed so I tried to plug it in. My laptop sees nothing at all.
It's normally really obvious when I plug in ANYTHING USB, example:

Code:

---

==> /var/log/kern.log <==
Oct 23 00:50:09 localhost kernel: [1566149.116799] usb 1-4: new high-speed USB device number 41 using ehci-pci
Oct 23 00:50:09 localhost kernel: [1566149.241670] usb 1-4: New USB device found, idVendor=05c6, idProduct=6765
Oct 23 00:50:09 localhost kernel: [1566149.241682] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Oct 23 00:50:09 localhost kernel: [1566149.241689] usb 1-4: Product: A0001
Oct 23 00:50:09 localhost kernel: [1566149.241696] usb 1-4: Manufacturer: OnePlus
Oct 23 00:50:37 localhost kernel: [1566178.011617] usb 1-4: USB disconnect, device number 41

---

Now, my USB port felt kinda poop so I've ordered and installed a new USB board. Still nothing on my PCs.
Now the tablet will show AC/USB on the battery page depending on where I plug it in to charge. So I thought it might be the kernel but I swapped kernels and that didn't help. It doesn't show up in the bootloader or in fastboot either.

Anyone have any ideas?
Where do I go from here?
Is USB just dead?