Macbook Air possibly Mobo problem?

[MeDownYou]

I got a Macbook air handed to me today and was basically told that the place they had taken it to get fixed rebooted it to "fix" their problems (certified mac repairmen my @$$...). Moving on, Apparently the user has had trouble booting it up and today they no longer could boot it normally or with shift+option/alt. I was able to start it by resetting the NVRAM. However, the original problem before boot instability is now present again being that garbled audio (sounds perhaps like electrical interference?) 

 

What do you guys take this as? I'm leaning towards an electrical problem rather than a specific speaker problem (interference happens intermittently almost like buffering with garble)

[Electronics Wizardy]

Probably a bad mobo. What was spilled on it?

 

Its probably time to get a new laptop, a fix will be 300-500+

[MeDownYou]

1 minute ago, Electronics Wizardy said:

Probably a bad mobo. What was spilled on it?

 

Its probably time to get a new laptop, a fix will be 300-500+

Not to my knowledge, but I can't say for sure it's not my personal laptop. It looks immaculate for a 4 year old laptop, so I'm leaning towards it not being spilled on. (They just took it to me after knowing that the local Mac store hosed them hard not actually doing anything for them and not giving them any information).

[TAHIRMIA]

7 minutes ago, MeDownYou said:

I got a Macbook air handed to me today and was basically told that the place they had taken it to get fixed rebooted it to "fix" their problems (certified mac repairmen my @$$...). Moving on, Apparently the user has had trouble booting it up and today they no longer could boot it normally or with shift+option/alt. I was able to start it by resetting the NVRAM. However, the original problem before boot instability is now present again being that garbled audio (sounds perhaps like electrical interference?) 

 

What do you guys take this as? I'm leaning towards an electrical problem rather than a specific speaker problem (interference happens intermittently almost like buffering with garble)

Stuff like this is why I tell all my friends to buy apple care

you could open it up to see if their is any liquid gone inside, or to try out another battery

[pwn_intended]

Have you attempted a full re-install of OSX?

 

One good thing about macs is that as long as your drive is not encrypted with file vault, you can re-install the OS on top of your current installation without losing ANY files or programs. If that fails, I would try a full re-format before attempting to replace the mobo.

[MeDownYou]

6 minutes ago, pwn_intended said:

Have you attempted a full re-install of OSX?

 

One good thing about macs is that as long as your drive is not encrypted with file vault, you can re-install the OS on top of your current installation without losing ANY files or programs. If that fails, I would try a full re-format before attempting to replace the mobo.

Not yet, i've been able to boot in a few times, I've been leaning towards a hardware problem. However, this seems like a good idea or at least to run recovery and see if anything changes. It takes about 50 attempts to boot when clearing SMC succeeded by clearing PRAM boot. Is there anyway to do this from within the OS via terminal perhaps since I currently have it booted once again?

[pwn_intended]

4 minutes ago, MeDownYou said:

Not yet, i've been able to boot in a few times, I've been leaning towards a hardware problem. However, this seems like a good idea or at least to run recovery and see if anything changes. It takes about 50 attempts to boot when clearing SMC succeeded by clearing PRAM boot. Is there anyway to do this from within the OS via terminal perhaps since I currently have it booted once again?

To my knowledge the only way to reset the pram/nvram is to hold cmd+opt+p+r while booting. I had a friend with similar problems a few weeks ago and what worked for me was to unencrypt her drive and re-install the OS in place without formatting first. YMMW though. I also have not played around with osx sierra yet, I am quire hally with el capitan for the time being.