Common issue on A1278 A1286 A1297 MacBook Pro. Intermittent RAM-Related Problems. No Start. 3 Beeps.

Equipment and parts I use:
Hakko FR810B-05 SMD Hot Air Rework Station: amzn.to/33Y4FNK
Hakko Air Rework Station Bent Nozzle Kit: amzn.to/3FOdPtl
JBC NASE-1C Nano Rework Station: amzn.to/3eKTKsB
Hakko FX951 Soldering Station: amzn.to/3JPVNdj
Hakko T15-BCM2 Concave Bevel Tip: amzn.to/3JSwLu1
Amtech NC-559-V2-TF Flux : amzn.to/3eGt9Nm
Low Melt Solder: s.click.aliexp...
Mechanic Leaded Solder 63/37: s.click.aliexp...

[@MrPnew1]

Hey welcome to the 1000 sub club Vlad. Well you got yours from actual real content, unlike me so that's great

[@applepietech]

Thanks, Peter! We need to re-upload Police Chase videos to get real subscriber volume :)

[@ТихонТроцкий]

I congratulate you with 1000 subscribers!🥳🥳🥳

[@applepietech]

Yay! Thank you!

[@inwerp]

i always thought thats a soldering issue. on 3115 boards you may see that two parts of socket separate and the main difference is that on 3115 it has way less solder. i fixed few boards by reworking outer row of the connector, however if broken trace is deeper it does not seem possible. i used led ddr tester method to find bad row.

[@applepietech]

Yes, that's another common fault especially on 820-3115 (2012 A1278) Models. I have a video on that topic as well. This is more of an age-related and I've seen several with such corrosion.

[@inwerp]

@@applepietech interesting, never thought there might be different reason for very same issue

[@applepietech]

@@inwerp If you think about it - it's exactly the same issue (intermittent contact with RAM modules), just a different cause.

[@MicroMageRepair]

Nice information, thanks!

[@applepietech]

Glad it was helpful!

[@tatsim5105]

Verry interesting, keep going.

[@applepietech]

Танюша, привет! Как жизнь молодая? :)