Xiaomi A1 Dead Boot

Hello,

My Xiaomi A1 shows me a black screen, and that's it. Everything i tried failed.
When I try to charge my phone, the notification led just blink in white.
And I can't go in EDL mode.
-> I tried with a handmade EDL cable (and, no, i wouldn't by a cable 15 bucks to wait it 5 weeks just to see that it doesn't works)
-> I tried with those famous "test points", and same, it didn't worked too.

No vibration,
My PC doesn't detect it as a Qualcomm thing or as any other name,
And, please, don't tell me to "TrY tO hOlD tHe PoWeR bUtToN 30 sEcOnDs" or any other button (vol - and vol+, vol- and power, vol+ and power, sacrifice a goat in the name of xiaomi, everything at the same time, etc.)
Same for the "Charge it for few hours kek" -> Tested. And I bought a second battery just in case, it didn't help me.

Have you any solution?
(And with details please, i'm a beginner)

Thanks in advance