MacBook Pro Retina Mid 2015 820-00138-A RAM beeping

[No-Clean]

In the past I did a reflow to the RAM chips on a MacBook Air, it worked but it came back after about 2 weeks, should I try the same here or what is the standard procedure?

 

[MOMOH]

Whats the history of the machine ? Liquid damage ? its very uncommon to have that on the 2015 15 inch :: Tha MacBook Air you did a reflow I suppose was a 2011, which was most likely the PCH and the reason why it came back .. Please confirm you have 1.5V Supply for the RAM

 

[JohnB8812]

Check for voltage to RAM as mentioned. If voltage is present, reflow RAM and pray. If RAM doesn't fix it, bad CPU, bad internal trace etc and waste of time.

 

[No-Clean]

No liquid damage, looks clean, when I first turned it on it did boot but shortly after it started beeping and that is why the customer brought it in.

Yes the other Air was a 2011 model one.

RAM voltage was there, so I went for the reflow, now the machine does not turn on, all power rails are there, not sure why it is not starting up.

 

[2informaticos]

The heat applied on the board affected CPU, or PCH.
Even some broken trace, which made intermitently contact before.
This is hopeless project...

 

[No-Clean]

Thanks, learned a lot from this one rare issue.