I often fix old Macs using instructions here, but it's not always the most economical solution.

iFixit charges $600 for the logic board. Two days ago I got a quote from the Apple Store for this same repair, and it's $698, which includes a 90-day warranty. (Actually, it's what they call their "flat rate repair," and includes replacing any parts that need replacing, not just the logic board.)

So for just $98 more than the cost of the part, you can have Apple replace the part for you.

So while I appreciate do-it-yourself repairs, I don't think this one makes economic sense at this time (May, 2023).

Note: This model will become "vintage" in June of 2024, and "obsolete" in June of 2026.

Apple won't fix vintage products, except for those sold in jurisdictions that require 7 years of service. (So far as I'm aware, California is the only state that has such a requirement. But some other countries (France, Turkey) have a similar requirement).

And Apple won't fix obsolete products under any circumstances.

Apple has used uncommon screws on Macs. One some MacBook models, the battery is held in place with a tri-wing screw.