Updating firmware for router

The word "brick", when used in reference to consumer electronics, describes an electronic device such as a mobile device, game console, or router that, due to severe physical damage, a serious misconfiguration, corrupted firmware, or a hardware problem, can no longer function, hence, is as technologically useful as a brick.

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Bricking a device is usually a result of interrupting an attempt to update the device.Many devices have an update procedure which must not be interrupted before completion; if interrupted by a power failure, user intervention, or any other reason, the existing firmware may be partially overwritten and unusable.Devices can also be bricked by malware (malicious software) and sometimes by running software not intentionally harmful but with errors that cause damage.Some devices include two copies of firmware, one active and the other stored in fixed ROM or writable non-volatile memory and not normally accessible to processes that could corrupt it, as well as a way to copy the stored firmware over the active version, even if corrupt, so that if the active firmware is damaged, it can be replaced by the copy and the device will not be bricked.Other devices have minimal "bootloader" firmware, enabled usually by operating a switch or jumper, which does not enable the device to work normally but can reload the main firmware.

A personal computer which uses Windows' operating system can be bricked by a loss of power during the update process, or by installing a faulty device driver.This kind of "bricking" and "unbricking" occasionally happens during firmware testing and development.In other cases software and hardware procedures, often complex, have been developed that have a good chance of unbricking the device.In some cases, Soft bricked devices are unable to be repaired without physical repairs being carried out; an example of this would be an i OS device locked with i Cloud Activation Lock, of which the only solution is to contact the owner of the i Cloud account the device is locked to, or to replace the entire motherboard with a non-locked board.This is similar to the procedure for loading firmware into a new device when the memory is still empty.Bricking is classified into two types, namely hard and soft, depending on the device's ability to function.