Phone restarts about every 30-45 seconds and loops again

I’ve got a Galaxy S6 that I’m restoring. I’ve replaced the battery and screen. At first the new battery was doing nothing and when charging, it would just show a battery emblem with a lightning bolt. I took it apart and saw corrosion on the battery connector on the motherboard. I cleaned that and now the phone goes to the Home Screen and is workable for about 30-45 seconds and then restarts again. I looked and was able to clean corrosion off of the frame power button connection plates and corrosion off of the connectors on the motherboard for the power button. Everything else looks clean. I’ve also wiped the cache and rebooted, tried safe mode restart, and made sure I didn’t see any other corrosion. Could the battery connector on the motherboard need replaced?