Default dead phone

Hi everyone , I have a serious problem .

My phone's battery ran out , so I plugged it to the charger , but my phone won't start up .

no vibration , no led , I tried so many things like pressing Vol up + power buttons

I tried to press to power button for some minutes , I removed the back cover , the sim card

but nothing happened , it only gets warm

please help , I just want to extract my data