This sounds similar to something that happened when I tried rooting my android phone. If it's the same thing, that means you will need to go to recovery mode and install an update.zip package that you can find somewhere online for it. It's because the code for what's supposed to happen after that screen is overwritten and it doesn't know where to go.
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I have tried that already - it does install the package fromthe zip fiel, but unfortunately, it still reverts to only the cruz flash screen.
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