Strange behavior - as if headphones were connected

[marmot]

I encoutered a stange problem:

With detached headphones, my qtek9100 behaves as if they were connected: speaker is silent during everything (mp3 playback, alarms, notifications etc.) except incoming calls :shock: . Built-in microphone is off. Speakerphone option during call is not working.

With attached headphones phone gets usable :?

I did a hard reset once, then flashed new AKU2 ROM - same stuff.

Obviously, it's a hardware problem, but what kind of problem could it possibly be? Connector? (BTW, does anybody know how it detects headphones - it can't be a mechanical sensor, can it?)

Thanks in advance.

[summiter]

I encoutered a stange problem:

With detached headphones, my qtek9100 behaves as if they were connected: speaker is silent during everything (mp3 playback, alarms, notifications etc.) except incoming calls :shock: . Built-in microphone is off. Speakerphone option during call is not working.

With attached headphones phone gets usable :?

I did a hard reset once, then flashed new AKU2 ROM - same stuff.

Obviously, it's a hardware problem, but what kind of problem could it possibly be? Connector? (BTW, does anybody know how it detects headphones - it can't be a mechanical sensor, can it?)

Thanks in advance.

It is a mechanical or electrical sensor - most likely mechanical since those are less costly to implement. If it is indeed mechanical, you'll need to locate the flexible switch inside the headphone plug - it's either bent or broken.

If it's electrical, the device detects continuity when headphones are plugged in and then switches off external sound. In this case it may be a component failure, or perhaps something that can conduct electricity has been lodged in the headphone jack.

Sorry I can't give you a precise solution. If I get some time I'll try to take a close look at the jack and see if I can identify possible causes better.

[marmot]

Does anybody know if built-in mic is functioning when headset is connected?