My friend has a Xiaomi Mi Game laptop (he says gen 2) that behaves strangely - mid section of the keyboard only works with caps lock engaged and is completely dysfunctional otherwise. We have disassembled the laptop and found that one of the traces of the left keyboard flex cable if slightly bent. This may be due to the fact that it is being pressed by a hard drive enclosure. The question is how do we fix this problem? Is it really due to the bent flex cable trace? Or maybe there is something else we should check? Should we replace the keyboard and how difficult is that? Any ideas are appreciated as always 🙏

⟐ Commented July 02, 2025 at 12:35 MST

One day my laptop stopped powering on.

Xiaomi official repair told me that problem is burned charge controller, it’s typical problem for that family, they don’t know which chip to replace and can only replace whole motherboard but it will cost almost same as new laptop.

Any chance to fix just charge controller ?

Attaching photo of motherboard, could anyone told me where is power controller chip ?

Motherboard rev R10-6050A2789401-MB-A01.

I found only MXIC 25L512e (seems like BIOS) and SIC831 (what is it?) chips on it.

Is needed chip under metalic cover ?

Other PCB images:

⟐ Commented February 28, 2024 at 11:05 MST

⟐ Answer accepted December 15, 2020 at 8:13 MST

⟐ Commented August 19, 2024 at 12:17 MST

⟐ Commented April 30, 2025 at 16:38 MST

If I open the back cover, disconnect the battery cable and CMOS cable from the motherboard, wait a few seconds, and then reconnect them, the system will start up normally. Once it's running, everything works fine—I can restart it or put it in sleep mode without any issues. However, if I shut it down completely, I can't start it again unless I repeat the process of disconnecting and reconnecting the battery and CMOS cables.

Can anyone help me understand what's causing this issue and how I can fix it permanently? Any advice or solutions would be greatly appreciated!

Thank you!

⟐ Commented August 19, 2024 at 10:31 MST

Help is very appreciated, as I have tried removing the battery and letting it sit for a while, which is the only solution that I have found so far from other people, which does not work for me.

⟐ Commented February 19, 2021 at 20:42 MST

after I spilled some juice on the keyboard it stopped working completely after couple hours, anyway i’d like to know if someone knows where I can find a tutorial to replace the keyboard or complete teardown of the laptop? (since I ordered a spare keyboard)

Thanks