Help Connect J7 to wifi / wire / or computer internet (for updates) [faulty built-in wifi]

[Cala Nijel]

Good Day!

Hereby with a problem I become mad

I had a Samsung J7 SM-J730F with what I believe is a faulty wifi (board has little corrosion where wifi should be place)

I have reset back to factory, and everything seems working except the wifi,
phone and 3G/4G also works flawlessly

So, I though, I will connect it to some land line trough a OTG wifi module, or wire-cable, or to the computer (as we use to do years and years ago) and update all SO, or when I would like to download something big

For daily use, phone-data is enough


but I can get it to work,

I have try
- Bluetooth pairing
- a micro usb and a usb wifi dongle
- even a cable Micro USB - Ethernet RJ45 (j)
(https://www.amazon.es/Ugreen-30219-Ethernet-Adaptador-negro/dp/B00WM9LUN8)



nothing seems to give connectivity to my phone,


anything else I could do ??

 

[Dannydet]

Replace the defective wifi module

 

[svim]

Are you having problems connecting to just one particular WiFi network, or is it also a problem trying to connect to a different WiFi network (i.e. friend's home or work)?
If the former it could be something with that WiFi network, try restarting the router and see if the connectivity problem still occurs.
If the latter that might indicate the problem is indeed with your phone. You made a reference to 'corrosion' on the motherboard, could you elaborate on that please? Was this phone previously dropped into water? Or did the battery leak out electrolyte? Also, as that's a reference to disassembling your phone, are you sure the connector between the antenna and the motherboard was firmly in place?

 

[Cala Nijel]

it is to any WiFi, and I factory-reset the mobile, it doesn't find anyone, neither never ROM changed (so should be as stock)
(and problem apear after the mobile spend some time in rice....)

@Dannydet , how can I change just the wifi module ??
it comes all in asingle board

 

[svim]

Apparently this phone has had exposure to water then. Not much more I can suggest, water and electronics create any number of problems so any components that fail are to be expected. The fact that the phone is otherwise functional at least means you can back up your data while you look into buying a new one.