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Downgrade firmware on ALSPA C80-75 CMM742.

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I downloaded firmware 2.86 by GE on CMM742, but I need to downgrade to the version 2.2 published by Alstom and it's not possible. Who can help me?

1 Answer

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answered by (194k points)
edited by

You need to use the WinLoader application to change the firmware of the device, however, it has been reported that downgrading is not possible no matter solution you choose to try. Acquire a new version of WinLoader and then attempt a possible downgrade, instead, downgrade successively, meaning you should downgrade from 2.86 to the available 2.84 and so on. Apply all the firmware versions in reversed order. Nobody suggested this, but I was succeeded to do that for other devices as well.

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