Had a 2019 MacBook Pro logic board give up the ghost last Tuesday

Luna Gibson · 2026-04-09T01:05:04.732183+00:00

Customer brought it in, said it just died. No liquid damage, nothing obvious. I spent three hours checking voltages and found a short on a 1.8V rail. Replaced the specific power IC, part number CD3215B12. It powered on for ten minutes, then the same fault came back. I think Apple's design on these is just flawed. Anyone else run into this specific chip failing repeatedly?

nancy4756mo ago

Those chips are absolute garbage, always fail.

5

barbara_campbell6mo ago

Honestly nancy475, I've had the total opposite luck. The ones in my old gaming rig ran for five years without a hiccup, and I'm still using a couple in a media server. Maybe you got a bad batch? I've seen more issues with the power supply cooking them than the chips just dying on their own.

2

the_nina5mo ago

Oh wow, @nancyw97 is right that the CD3215B12 can fail, but the design isn't flawed-it's usually a voltage spike killing them.

3

nancyw975mo ago

Three hours seems like a lot for a power IC...

1