Hi,
Check your charger and cable first. Don't try to charge it with from the laptop's USB.
Do you have a reaction from the tablet when you try to enter the Android recovery menu (Volume UP + Power button), or Download mode (Volume Down + Power ON)? If not, try to connect it to the PC. If the Windows can't see connected device, then you have a hardware problem and you need a help from a specialist.
Regards.