Is the motherboard purchasable somewhere?

Hi Zachary,

Yes, it does appear you can buy a replacement motherboard for your 7 Pro. I generally assume you're going to find used parts; here are a couple of examples.

Google Pixel 7 Pro LCD Spare Parts Original Accessories Store - Cellspare

Replacement 128gb Motherboard for Google Pixel 7 PRO T-Mobile G949-00305 OEM

On the other hand, it appears there's at least one vendor on AliExpress selling what they claim are new motherboards for your phone. I have no further information about this, so it's definitely a case of buyer beware.

Original Motherboard For Google Pixel 6 7 Pro 5 Unlocked Logic Main Board Circuits Panel Work 128GB 256GB Mainboard Replace - AliExpress

Generally I start looking for something like this on the three big sites, Amazon, eBay and AliExpress, then a general internet search like the one that turned up the Cellspare company listed above. Of course, you'll want to verify that a used board is usable with your provider; i.e., it's not SIM locked or has a bad IMEI. If you have the IMEI you can generally check with your provider to find out if it's compatible; for instance the eBay listing I posted says it's a T-Mobile phone, so it may or may not work with, say, Verizon.

Hopefully that'll get you started; let us know how it all turns out for you!