For a while now I have come across people with bricked device and even received calls about their bricked devices and ways they can unbrick it, they tend to forget that while we are busy trying to tweak and beautify our devices, the heavy price we have to pay if we are not careful is ending up with a bricked device.
the funny thing is that most of them can't even differentiate between soft brick and hard brick and hardbricking, well i have decided to make a post on the difference between soft brick and hard brick, so seat back and and enjoy

differences between softbrick and hardbrick

Also read; How to backup and restore stock/custom rom

Steps

-you should be able to boot into your recovery mode, but you should be stocked at the new animation, whenever you encounter such problems, you have to download and flash back on your device

-If the situation is like you are not able to boot into your custom/stock recovery then you are at stage two. In these cases you have to use the Smart Phone flashing tools like:
• SP FLASH TOOL (for MTK chipsets)
• ODIN (for Samsung devices)
• Mi flash tool (for Xiaomis)
etc for flashing. So if the drivers are properly installed on the system which you are using then it will be able to detect your device in the "device manager" section on Windows.

Hardbrick

-When the device has gone through problematic conditions such that it quits the detection of USB, charging and everything that you provide to it then the device is unfortunately hard bricked. Some hard bricked devices are as good as a paper weight that we paid for some day. But that is the extreme case lets see what are the two stages we can observe here:

Stage one: At stage one the device keeps getting disconnected every 5-8 seconds when you connect it with the flash tool via data cable (specially with the mtk devices I have seen). So in that cases we only have few seconds of time gap so that we can make the flash tool to detect the device. Hence, we have to find out certain key combos on the device which will lead to detection of your bricked device to flash the "stock ROM" while it kept connected to the data cable. Key combos could be:

-Volume Up + Power button

-Volume Down + Power button

-Volume Up + Volume Down

-Power button alone

-next step is that it occurs when some serious hardware damage happened to the device such as malfunctioning of the motherboard, Processors, Internal circuits etc. If the device reaches to this condition then it does needs repair on the segment of the hardware. In case if the device is under warranty then I recommend not to break the seal of the company or else the warranty will get void.