Did too many upgrades at once, now have charging issues macbook pro A1398 late 2013

He everyone, having a disheartening experience after trying to help my dad out, by upgrading his old macbook.

Issue: magsafe power adapter stops charging, light goes off, wont charge until the battery is completely drained.

I upgraded the macbook with a new SSD https://www.amazon.com.au/dp/B01CWWAENG?psc=1&ref=ppx_pop_dt_b_product_details

put in a new battery https://www.amazon.com.au/dp/B0DF1V595M?psc=1&ref=ppx_pop_dt_b_product_details

and used opencore legacy patcher to upgrade to sequoia.

now I'm trying to figure out what is causing the issues.

can anyone talk me through a way to trouble shoot and rule out what the problems could be?

So far I believe I have ruled out the power adapter being the issue as I have two power adapters and two macbook A1398's and both adapters show the same behaviour on the one i upgraded, and both adapters work fine on the other macbook.

I have tried resetting the SMC and the PRAM, but I'm not 100% sure I succefully did it.

I also removed the battery and tried running off the AC adapter only, but computer would not boot.

I'm happy to run these test again.