Lenovo x1 carbon gen 2 four times blinking

[Zeonalbasta]

hello guys
i have a problem with lenovo X1 carbon gen 2 laptop, with motherboard code "LMQ-1MB 12298-2 48.4LY07.021"
The main problem is that when I plug in charger, the power LED indicator flashes 4 times, the fan spins for a moment then turns off again and keeps repeating, I've tried flashing the BIOS but the result is still the same
I hope someone can help me

[mon2]

Which color of led(s) are being flashed?

Troubleshoot or diagnose problems - ThinkPad X1 Carbon Gen 12 (2024) User Guide (lenovo.com)
* not sure if your generation offers orange / white leds or not

ThinkPad Charger LED Diagnostics - Lenovo Support US

Does your board look like the attached?

Do you have a link for the schematics?

[Zeonalbasta]

The LED light on the power button is green, which I'm confused about, usually blinking slowly indicates the laptop is in sleep mode, but in this case the LED light is blinking quickly, sir.

and it's true that the boardview you shared is exactly the same as the laptop model I have, sir
Sorry sir, i don't have the boardview link

[piernov]

Power LED blinking a few times when connecting AC adapter is the normal behaviour on ThinkPad.
The LMQ-1 board is plagued with CPU-related issue however.

[Zeonalbasta]

how do i know that my CPU is good or bad.?
after I checked there was no short circuit on the board, all the power on the board was all good. The laptop seems to want to turn on but is unable to boot