HW issue - Can't hear caller after reassembly - Xperia Z3 Compact Q&A, Help & Troubleshooting

Hello,
I have replaced the headphone jack on my Z3 Compact as the old one wasn't working properly. The usual issue with this model as it seems.
After reassembly of the phone everything works fine but one thing - I can't hear any callers via the default earpiece.
Details:
It works ok if I put the call on the loudspeaker.
The caller can hear me (so the mic is ok).
Music Player & FM radio work ok in both mono and stereo mode if headphones are plugged in.
Music via loudspeakers works ok (both speakers).
In service test *#*#7378423#*#* -> Service Test -> Stereo speaker left is silent, no sound at all. Stereo speaker right is ok.
In settings - about phone - diagnostics the Ear Speaker test fails as well
As no software was changed/updated, I presume it is a HW connection issue after the reassembly.
Which connection might cause this problem?
I will reassemble the phone again, but I have no idea which connector is creating the problem.
The phone is obviously past its warranty date, so I want to try and fix this myself. Thank you.

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I'm having an interesting issue, and none of the things I've found on forum search seem similar. I recently replaced my XT1053 Dev Edition due to a cracked screen. I have an Apple Earpod headset the used to work fine for calls...that is, I never really bothered getting the buttons to work, but the headphones output audio just fine, and the mic worked in calls so I could leave my phone in my pocket.
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Not compatible with the X. Sorry. ?
According to this reddit thread the mic will work if you hold down the center button while plugging in.
http://www.reddit.com/r/MotoX/comments/1x31i1/headphones_with_mic_that_work/
Actually, the iPhone headset DID work fine on my last Moto X before I had to replace it. I was able to listen to music and make calls with it, and the mic worked. I'm wondering why it doesn't work anymore, if there's some software fix to it not working.
Well, a while back there was a lot of posts saying it didn't work. If it did or does, great.
Bottom line tho, if you plug it in and it works, awesome. If it doesn't, then it won't.
No software will help. ?
adamkaye said:
I'm having an interesting issue, and none of the things I've found on forum search seem similar. I recently replaced my XT1053 Dev Edition due to a cracked screen. I have an Apple Earpod headset the used to work fine for calls...that is, I never really bothered getting the buttons to work, but the headphones output audio just fine, and the mic worked in calls so I could leave my phone in my pocket.
However, recently with the new phone, I'm having an issue with the headset. Now the mic doesn't work on phone calls. Phone audio and music output fine. The other weird thing is that, if I'm listening to music and someone calls, and I pick up the call with the headset in (then find the mic doesn't work), I'll unplug the headset to use the phone regularly...but when I do, the phone defaults to speaker mode for some reason.
Not sure if this is (hopefully) an easy software fix, but if anyone has insights, I'd love to hear them. I don't think it is the headphones, as they work in my wife's iPhone just fine.
Click to expand...
Click to collapse
Hi,
I'm using a blackberry headset and having no issues with audio/mic. But I'm having the issue where the phone defaults to speakerphone mode when unplugging the headset in the middle of a call. This issue didn't go away with wipe cache partition, factory data restore and a warranty replacement!
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So I haven't use the earphone for 2 months cauz I used a Bluetooth earphone. However its broken now which switch me back to use a wired earphone which I was using before I bought Bluetooth one. But it doesn't work anymore(I tested on other devices earphone worked fine), and what surprised me that is the earphone only worked one side(right) after I install an app to force my phone to switch sound to earphone mode but the other side just won't work.
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