Xperia Z3 D6603 Signal poblem after replacing screen on 2 devices! Please read.

[DriftBoris]

Hi all, so occasionally im buying some broken xperia phones and repair screens mostly z1. but recently i started z3 and now i saw what mistake was. so i had 2 same xperia z3 phones both replaced screens and when i stared phone i saw signal has 2 bards where need to have all bars and then drops and again, i have try new signal cable new anntena module, cleannig metal plate, swiching housing to original where lcd was broken and now luck sometimes i get normal signal when disconnect signal module from plastike holder and put it on metal plate and holding with fingers but when i relese my fingers signal drops.. also i have tested with z1 signal module and signal aslo works great but only when i hold with fingers. on first z3 signal magicly just stared working when i disassemble and assemble all again, but on second one still no luck and i dont know what esle to do.

 

[thelegacy2010]

Hi all, so occasionally im buying some broken xperia phones and repair screens mostly z1. but recently i started z3 and now i saw what mistake was. so i had 2 same xperia z3 phones both replaced screens and when i stared phone i saw signal has 2 bards where need to have all bars and then drops and again, i have try new signal cable new anntena module, cleannig metal plate, swiching housing to original where lcd was broken and now luck sometimes i get normal signal when disconnect signal module from plastike holder and put it on metal plate and holding with fingers but when i relese my fingers signal drops.. also i have tested with z1 signal module and signal aslo works great but only when i hold with fingers. on first z3 signal magicly just stared working when i disassemble and assemble all again, but on second one still no luck and i dont know what esle to do.

I used to have a similar problem like yours before. Network range was really bad after replacing the LCD. Then I replaced the whole antenna module with speaker at the bottom and now everything is fine.

 

[DriftBoris]

Thanks for reply.. yes it seems logic but how is possible to work when touches my fingers without pressure and how is possible to work on first phone after like 10 trys i dont get.. i dont want to spend more money on new board and time to arrive and to happen same. also i didnt damage board or connector, coz i dont pressure on connectors when signal incrases...

 

[thelegacy2010]

Thanks for reply.. yes it seems logic but how is possible to work when touches my fingers without pressure and how is possible to work on first phone after like 10 trys i dont get.. i dont want to spend more money on new board and time to arrive and to happen same. also i didnt damage board or connector, coz i dont pressure on connectors when signal incrases...

I have no idea how you get signal while you touch your fingers. Maybe your fingers act as extended body antenna like. You know what I mean.
Try removing your full antenna module at the bottom and fix it again. There might be some lose contact.

Otherwise replacing your whole antenna module is the only fix. I had paid around 20$ for the antenna module with speaker.