Won't charge no light on MagSafe 2
I replaced the top half (keyboard, trackpad, battery, and top case) due to keyboard problems (the customer had dropped it, and it would not boot up) I also changed the SSD due to it being dead. Everything came up with a new OS load (Big Sur) and was charging (lights working on MagSafe 2) with no issues.
I let it charge overnight all was working great with no issues, gave it back to the customer and a few days later he said that it was having charging issues where the light would come on and then go out and not come back on
I took it back and swapped out the charger with a known good one and got the same problem, no lights (I even plugged his charger in my old MacBook Pro 16" late 2013 and it works). Reset SMC no change. Replaced the DC-in power board still no change.
Replaced the battery still no change. Ran Apple Diags get PPP002 and PPP007 errors, which points to the power adapter (no charging lights)
I’m running out of ideas to try.