Repaired aliexpress 1000 3G motherboard, but the shop couldn't figure out how to fix headphone jack

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SeyMotor

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So i had to do a motherboard replacement when my 3G PsVita 1000 started showing GPU crashes, so i got the cheapest aliexpress motherboard since there wasn't any better choice when I'm in Brazil.

I go to a shop to replace it, it's clearly a recycled used board since it was a bit scuffed, the volume minus button was missing, it had soldering marks, the headphone jack only played on the right side and the charging port went bad after a week.

Now i got to send this to one of the few shops in my state that i could get a Vita repair, and they took a while but they fixed up all the other main issues, but they called me before i had to pay telling me that they tried replacing the headphone jack but it still had the exact same issue.

there's gotta be a deeper issue than just a bad jack then, i even sent them my old board in good condition for parts, but that didn't help them here. No matter how you connect it, or even by slightly putting a cable in, it will only play right side audio, even when it manages to connect to my left speaker, it's clearly mono R audio.

what could have caused this? i never heard of this type of damage before, but it's really annoying considering how long i had to wait to get my vita repaired. I'd really like to still be able to properly stream my vita to my PC, but this is gonna get in the way
 
No audio on either L/R side, might be caused by a broken trace from the connector to the board, or in the board itself.

That would require a seasoned service repair man, it might not be as easy as it sounds to repair it, and it will require some tools that not all repair shops have, like a microscope and an oscilloscope.
 
So i had to do a motherboard replacement when my 3G PsVita 1000 started showing GPU crashes, so i got the cheapest aliexpress motherboard since there wasn't any better choice when I'm in Brazil.

I go to a shop to replace it, it's clearly a recycled used board since it was a bit scuffed, the volume minus button was missing, it had soldering marks, the headphone jack only played on the right side and the charging port went bad after a week.

Now i got to send this to one of the few shops in my state that i could get a Vita repair, and they took a while but they fixed up all the other main issues, but they called me before i had to pay telling me that they tried replacing the headphone jack but it still had the exact same issue.

there's gotta be a deeper issue than just a bad jack then, i even sent them my old board in good condition for parts, but that didn't help them here. No matter how you connect it, or even by slightly putting a cable in, it will only play right side audio, even when it manages to connect to my left speaker, it's clearly mono R audio.

what could have caused this? i never heard of this type of damage before, but it's really annoying considering how long i had to wait to get my vita repaired. I'd really like to still be able to properly stream my vita to my PC, but this is gonna get in the way
The (headphone) amp could be bad, or it could be a capacitor connected to the amp. Either way, you can probe with a small speaker on the amp chip to see if any audio is going into the amp, you should be able to hear audio from the speaker but it will be very low on the input side. If there is audio going in but no audio coming out, then you've confirmed the issue.
 

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