Bizarre vibration Poco F3

[kinsah]

Hi there.
I'm on MIUI 14 on my Poco F3 (14.0.7.0 for alioth), but since version 14.0.6.0 about a couple months ago my haptics response is going weird for some unknown reason. After some hours of phone resting, the vibration for almost all apps, keyboard and so on goes mad, very intense (cannot explain, but something not natural as in use for almost 2 years since I bought it). I've search in vibration and haptics settings, but nothing changes for normal. Interesting is that, if I reboot the phone, the weird vibration desapear and all become normal until it goes for a deep rest (I don't know if it goes to a deep rest, but when the phone is not used for some hours, mainly at night charging). I did even a fresh ROM install of the 14.0.6.0 via TWRP, only not deleting internal memory, and since yesterday the version 14.0.7.0 via OTA, the problem is still going on. If someone passed through this or know the probable issue, please help.
Thank for the time.

 

[kinsah]

Today I've connected my Poco F3 to the PC, and I realized that it isn't anymore recognized by the computer, anyway I try (normal system connection, recovery or fastboot, any USB port). So, I cannot do anymore data transfer. And then, after a while connected, the bizarre vibration returns (and it happens when the phone is put in charging, any charger, including original and original orange cable). I think the USB-C port of my F3 is gone. Very sad. Very happy with the phone, but this is a intense setback.

 

[phonetic]

I'm facing exactly the same problems with my Poco F3, there is a strange vibration and the phone cannot be detected by the PC, data transfer does not work, but charging does.

So I just wanted to ask if you maybe solved the problem? Have you tried replacing the charging/data board, the haptic vibration motor, or perhaps even the main flex cable?

 

[kinsah]

I'm facing exactly the same problems with my Poco F3, there is a strange vibration and the phone cannot be detected by the PC, data transfer does not work, but charging does.

So I just wanted to ask if you maybe solved the problem? Have you tried replacing the charging/data board, the haptic vibration motor, or perhaps even the main flex cable?

Hi there. I didn't try anything further. As my daughter wanted a new phone (she was asking for a Redmi Note 12 in September, and Poco F3 is in a higher ground), I've bought for me a Poco F5 and given her the F3. But the phone is still working so far, without conservative cares as I always kept (she drops the phone to the ground very often...), except for the behavior I've written here in July, 2023. When she's bother with the strange vibration, she reboot the phone and it goes away until next battery charge, normally at night, one charge per day is enough for her). And for data, via WiFi (ftp protocol with the PC).

 

[phonetic]

Thanks for the reply. Everything you described is exactly the same with my phone, so I'm trying to find a way to fix it if possible. I'll let you know if I manage to fix it. Perhaps someone else is experiencing the same problems.

 

[Dandruida]

A mi me pasa exactamente lo mismo.

 

[phonetic]

Unfortunately there might not be a solution, since it's probably a hardware problem, but maybe some people really have a bad USB board, so replacing it might fix the problem with the USB.

I have tried to reflash the same ROM I already had, and also a previous version, thinking that it might have been a software problem (something with the ROM that was causing the issue), but it wasn't. So in my case at least, it's a hardware problem.

Unfortunately, a lot of people are having these issues. And in my case, the problem is that the CPU itself is starting to fail. Now, you might find that people are talking about reballing a CPU and how that will fix the problem, but that is not a permanent fix, just a temporary one, and it will probably last a couple of months at best, as people who did the reballing method are also saying. That is because the problem are not the solder balls under the CPU, but the bumps inside the chip itself. Now if you just heat the chip a little, the USB might work and probably will start working again, and the buzzing vibration will also go away. That is what's happening when they reball the chip. They don't actually have to do the reballing, they just have to heat the chip a little to make it work again.

Here are some videos if you are interested in a more detailed explanation of why that is:

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When I applied heat to the back of the phone to open it, that heat is in my case probably enough to even heat the main board a little and the chips on it, so my USB started working again for a short time. So, if you want, you can try heating the back of your phone with a hair dryer and it might start working for you too. But of course, that will really not last long at all, just maybe a couple of minutes. You can try this method if you maybe bricked your phone and really need the USB port to flash a new ROM file, then it might be worth it, but other that that, there is no solution.