Replacing Logic Board on 2019 MacBook Pro 15″

Personally I don't recommend repairing any of the Apple USB-C Intel Macs for a number of reasons. The Logic Boards on the 2019 models have a much higher failure rate than any previous models, but there are other reasons as well. The money spent on repairs is better put towards a new laptop. The M-series Macs are the future. The Intel Macs won't be receiving new updated apps in the near future (no one knows when yet, but it won't be long) so that $1,000 repair may not give you too many more years of use for this laptop.

I would just get the new MacBook Air. The main difference between an Air and the base Pro these days is the cooling fan, which matters if you if you do processor-intensive tasks (gaming, video transcoding), but not so much for general use.

In any new Mac be sure to specify MORE than 8GB RAM. The ones with only 8GB are suitable ONLY for students who never expect to do anything very quickly.

8GB is the amount needed for macOS Ventura or later -- just for macOS, not for anything else running.