I am really stumped by this problem, and I'm really hoping you guys can help as I'm pretty sure it's a hardware issue...

Basically, I get no audio from my MacBook Pro Retina 13" Late 2013 A1502 16Gb 2.6GHz - everything else works beautifully as ever with this machine (incl USB & power) apart from the sound.

It has *not* experienced any water damage or drops, but I'm pretty sure this problem started when I plugged in my external power speakers' amp to the headphone jack... just like I did everyday before that, but for some reason this time I didn't get any sound output and the volume feedback was delayed when I tried to turn the volume up/down.

Symptoms:

• Built-in speakers don't make any sounds.
• No sound coming from output jack (headphones or external speakers).
• I see the volume no-access icon (circle with diagonal line through it) when trying to change volume
• checked System Preferences->Sound settings: nothing showing up under the Output or Input tabs (no "Internal Speakers" showing up)
• NO RED LIGHT coming from headphone jack... so it's not the optical speaker switch problem most people seem to have.
• In "system information", when I look in sound hardware... no description for input, output, etc...

I've hunted and hunted all over the internet trying all various suggestions that others have had success with - I've tried all of the following, but still no luck:

I've tried all of the following in the listed order but nothing's changed:

• repeatedly plugging & unplugging different types audio equipment to the headphones port (including apple headphones)
• disk utility and run disk repair (no errors)
• tried PRAM/NVRAM resets (I don't hear the "chime" sound)
• tried logging in via a new user account
• tried deleting ~/Library/Preferences:com.apple.systemsound.plist
• plastic toothpick in the hole
• looking in the hole with microscope & 1.8mm led to illuminate - can't see anything obstructions in the hole
• I downloaded and booted the ASD software EFI and OS diagnostics - no errors
• tried disconnecting battery then rebooting
• an isopropyl alcohol swabbed q-tip cotton swab

I also went to see a Genius at the Apple Store - they did their tests and said "there's only two options:

• replace the logic board as we don't replace individual components, or
• use a USB adapter"

The logic board repair quote was extremely expensive as my warranty is over and the charge probably includes replacing all 16Gb of memory too as it's soldered in; and I said I didn't think that last suggestion was very Apple-like - I'd need to carry around an ugly USB adapter and an external speaker/mic device just to hear sound!

So I'm at a loss and need your help!

Everything else works fine on my computer, so I'm willing to get my multimeter out and start testing hardware but I'm not sure where to start (I/O card / Logic board?).

My logic board # is 820-3476-A

Thanks

My LG G5's battery life doesn't last the full day it is supposed to.

I have mackbook air early 2014 has liquid damage I cleaned the mother board ,and it does power on now,but there is no back light . The wired things is it’s working fine when I disconnect the flex cable between the motherboard and charging port .i tried new flex cable new charging port but still have the same issue .what should I do?help please

where can I find mid 2012 macbook air memory upgrade step by step instructions?

I just replaced my keyboard, and everything seems to be back in place and working except for the new keyboard. It seems like that’s usually an issue with not putting the connector back all the way– does the image look correct? Is this keyboard just defective?

As I can’t seem to run the apple hardware test as it gives me a load error. I have been thinking about replacing the speakers in my device. They still work, but the volume on them is not what they used to be. When I first bought the MacBook back in 2012 the sound coming out was louder, crisp, you could use it to listen to music or watch movies. These days however, I can have it turned up full and its hitting no where near the volume it used to.

Is this an indication that the speakers might need replacing or (as I read elsewhere) could it be to do with the later versions of OSX throttling the volume on the device?.

I’m not sure I could find my 2015(?) MacBook Pro in the fix guides as it’s 13” I think and has no ports except one USB-C. It still turns on but the keyboard won’t work and the battery is basically dead if unplugged so I can’t use it at all. I spilled water on it and the speakers died in 2016.

I can’t find this MBP with no ports on Ifixit.

As I can’t seem to run the apple hardware test as it gives me a load error. I have been thinking about replacing the speakers in my device. They still work, but the volume on them is not what they used to be. When I first bought the MacBook back in 2012 the sound coming out was louder, crisp, you could use it to listen to music or watch movies. These days however, I can have it turned up full and its hitting no where near the volume it used to.

Is this an indication that the speakers might need replacing or (as I read elsewhere) could it be to do with the later versions of OSX throttling the volume on the device?.

My computer is stuck in a boot loop. As soon as the battery is plugged in the fan turns on, computer chimes, fans stops, fan on, chime, and so on. The screen remains black throughout. I have replaced the logic board, RAM, and battery all without any improvement. Resetting the SMC and PRAM did not make any difference. If I unplug the ribbon cable from the keyboard, plugging the battery in does not start the fan or the chime, however with the cable unplugged I can’t turn on the computer at all. What do I do next?

I have mackbook air early 2014 has liquid damage I cleaned the mother board ,and it does power on now,but there is no back light . The wired things is it’s working fine when I disconnect the flex cable between the motherboard and charging port .i tried new flex cable new charging port but still have the same issue .what should I do?help please