In the world of electronics, the word "brick" describes electronic devices that have a serious misconfiguration, corrupted firmware or a hardware problem, can no more function.
We can't call a device that have a problem we can easily solve a "bricked device" , such as a computer that needs only a format or a computer device that needs a bios upgrade or a driver to function.
Let’s say we tried to update the firmware of the bios or the HDD or any hardware, and this update is corrupted, that can cause a misconfiguration of these devices, and can no more function, because the firmware stored in the ROM is damaged; now we can talk about a bricked device.
Most of the time, updating a firmware is one of the most common causes that "brick" your device.
let’s say while firmware updating, you turned off your device, or you unplugged it from computer - if you update your device from computer"- there is a big chance to "brick" your device, this is what u need to avoid if you are updating firmware, that's why we see this kind of phrases during the upgrade "warning: DO NOT turn off the power switch...".
What u need to do if your device is bricked:
1- use recovery mode, although this option is not available in all computers, specially the old ones, and for IPhones there is an alternative option called DFU MODE.
2- call your device manufacturer to repair or change your bricked device, if the problem is caused by an official firmware update...
3- JTAG method, it is not simple for simple users but it's the best way to repair and store back the firmware back in the device ROM, it's advised to go to a specialist to carry of JTAG process
Remember: Be careful while doing firmware update...
