Xperia J signal problem

[zafisinl]

Hi!
I recently changed lcd+touch screen on 2 xperia j phones.When i finished both phones had problem with the signal.It was very weak or none.With other phones same network i had 4 bars but with xperia j 1 bar or none at the same place.I changed the rf signal cable and the flex link but same thing happens.I didn't changed yet the mic pcb.Is that related to low signal?Any help would be appreciated.

[kammy6000]

you are missing connections

is the antenna connection at bottom connected the one under board
beside battery connector?

there are 2-3 corner connections must be touching otherwise no signal this phone doing this always especially for 3g

the mic board don't matter check the antenna plug connectors are ok

http://www.xperiaguide.com/2013/05/1...ual-guide-pdf/

[zafisinl]

Hi!
I manage to fix the signal thanks to you!I double checked the connection and when i was closing it the rf cable was loosen.Now i have another problem.When i close the phone and put the battery on to test it the back button,the home button and the settings button down the the touch screen are always on.Any help?Thanks!

[zipikiki]

Hy

I have the same problem. Network and the buttons touch screen always on.

Did you fix that problem?
Can you help me?

Thanks