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# Flashing firmware internally
**WARNING:** If you flash a broken firmware and have no recovery mechanism, you
must use the **external method** to flash a working firmware again.
## Using flashrom
This method does only work on Linux, if it isn't locked down.
You may also need to boot with `iomem=relaxed` in the kernel command
line if CONFIG_IO_STRICT_DEVMEM is set.
For more details please also check [flashrom's wiki].
Use the programmer *internal* to flash *coreboot.rom* internally:
```bash
flashrom -p internal -w coreboot.rom
```
[flashrom's wiki]: https://www.flashrom.org/Flashrom
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