crwdns2935837:0crwdne2935837:0phone keeps turning off and on, getting fairly hot. - Samsung Galaxy S21 Ultra

phone keeps turning off and on, getting fairly hot.

I've replaced the battery, charging port and proximity/flash sensor as all were showingon diagnostic. please help 🙏

crwdns2947414:01crwdne2947414:0

galaxy s21 ultra sorry lol

crwdns2934271:0tiawara ta 11 agoNdz 17, 2025crwdnd2934271:0 Justin Bass crwdne2934271:0

crwdns2933313:01crwdne2933313:0

crwdns2933897:0crwdne2933897:0

It's getting hot because CPU is trying to work when booting, it's ok, but looks like trouble is somewhere in the firmware or ROM IC, if boot fails

crwdns2934105:0crwdne2934105:0

crwdns2889612:0crwdne2889612:0 0

crwdns2944067:05crwdne2944067:0:

what would you suggest 🤔

crwdns2934271:0tiawara ta 11 agoNdz 17, 2025crwdnd2934271:0 Justin Bass crwdne2934271:0

@justinbass11726 try to reflash, if fails then you need to replace the phone's motherboard.

crwdns2934271:0tiawara ta 8 agoNdz 17, 2025crwdnd2934271:0 pikudo crwdne2934271:0

Also sometimes trouble is called by failed power controller or ROM/CPU failure.

crwdns2934271:0tiawara ta 8 agoNdz 17, 2025crwdnd2934271:0 pikudo crwdne2934271:0

Also if some IC's getting anomally hot, maybe it's a termal shutdown, then you need to diagnose the heating IC.

crwdns2934271:0tiawara ta 8 agoNdz 17, 2025crwdnd2934271:0 pikudo crwdne2934271:0

appreciate the information 🙏. I shall do some investigating 🔎

crwdns2934271:0tiawara ta 8 agoNdz 17, 2025crwdnd2934271:0 Justin Bass crwdne2934271:0

Samsung Galaxy S21 Ultra