phone won’t turn on or display won’t come on.

i have a pixel xl and it was being used, but not frequently and spent a lot of time on the charger over the last year. i hadn’t looked at it in a few weeks and when i did the phone wouldn’t power on and the battery was bulding enough to push the display away from the frame a fair amount. i replaced the battery and after putting it back together it is still not coming on.

i’m trying to figure out a good way to troubleshoot this issue. could the buldging battery have damaged the lcd and/or backlighting? i’ve had buldging batteries in laptops and other phones before and they would turn off instantly if unplugged, but never fully unresponsive. with that and the phone not coming on now is why i’m wondering if maybe the display is damaged. another display is like $50 so i’d prefer to not have to do that, but i might not have a choice.