My Arduino board is malfunctioning in its bootloading and I thought weather I can overwrite the previous bootloader on the atmega. I mean to ask than can I simply reinstall bootloader on a chip that already has a bootloader installed.
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yes. you need an ISP programmer or other Arduino with "Arduino as ISP" sketch.Juraj– Juraj ♦2019-03-18 14:40:43 +00:00Commented Mar 18, 2019 at 14:40
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Yes you can. A Programmer that is driven from a PC and connects to SCK/MOSI/MISO/Reset/Power/Gnd (the ICSP header on an Uno/Mega), or a Standalone Programmer that can program a bootload program stored on an SD card and connects to the same ICSP pins, is needed to access the bootload memory to load/reload the bootloader.
