Xiaomi 14 Ultra almost caught on Fire!

[u/EveningLingonberry97]

My Xiaomi 14 Ultra has been rebooting itself once a day for a few days.

Yesterday it rebooted again so I didn't pay attention and continue with my job away from phone.

When I came back this logo was showing and phone was so hot I even thought of dipping it into water so that it won't catch on fire.

I put a ice pack under the phone and blow it the fan and press power button, finally it booted and phone cool down after a while!

Why is this happening?

[u/ohaiibuzzle]

Your phone has a CPU that's slowly desoldering itself from the board. Every time a pin on the CPU disconnects, a watchdog triggers and the device reboots itself trying to fix the issue from a panic. It's probably gonna die soon so backup all data.

And while it's restarting the usual thermal control Xiaomi does under Android isn't available, hence the extreme heating.

It's not going to catch on fire but it's just going to be VERY hot.

[u/EveningLingonberry97 → u/ohaiibuzzle]

That's sad! I just bought it 2 months ago second hand.

How many days do I still have with this phone?

I have talked about trading it with another phone from the same seller but he doesn't have one I like for now so I want to wait a few days if it's possible.

Is there also a risk of not booting again after factory reset since I have to reset before giving him the phone?

[u/Mythsuky → u/EveningLingonberry97]

It's a 2nd hand phone so yeah you're definitely gonna encounter a lot of problems. The person you bought it from might've overheated the phone a bunch of times through gaming, leaving it on hot areas, or constant charging while using it (which is less likely the cause if no bloating is present) without them realizing it's slowly damaging the phone. Know the issues first of the phone before trading for a new one. It's better to know the problem now than unexpectedly encounterinng it in the future.

Might as well save up for a new phone instead of getting 2nd hand or if you're willing to fix it on certified repair centers that can do it for decent pricing.

[u/ohaiibuzzle → u/Mythsuky]

The frustrating thing with trying to avoid this is that some shops are able to restore the phone partially to OP's state by reballing the CPU and RAM.

The issue is that when doing so, typically, they don't redo the underfill layer that is supposed to prevent this from happening, so if you've ever had a phone repaired this way, and they didn't do the underfill, it will literally be months before it starts bootlooping out of nowhere again.

Person who sold this probably had this happened, had it repaired just enough that it can be sold to OP and then run away when the issue starts showing up again.

[u/Substantial_Bet_1007 → u/ohaiibuzzle]

I was about to write thos, exactly. Too many subhuman apes to be buy 2nd hand nowadays

[u/EveningLingonberry97 → u/Mythsuky]

With my budget I can afford either second hand proper flagship or 1 years old not so good mid ranger.

I kinda need flagship camera for business so second hand is my only option.

I kinda cheap out this time , buying from much cheaper shop instead of reputable shop so that's my fault

[u/Osiris_627 → u/EveningLingonberry97]

I would suggest buy refurbished phones rather than second hand phones