Huawei P8 Bricked or already Dead?

So i have a big problem my huawei p8 wont work without cable(aka dead battery)and it stucks in huawei logo ... so when my huawei is connected to wall charger i can connect to factory reset wipe data sector but when is on pc i can't get there?I tried with fastboot to fix my phone didnt work i tried with dload and is again stucked?What should i do

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