failed to boot Jetson TX2 after flashing JetPack 4.2

I followed AI hello world and was able to have the live camera working. I restared the Jetson and now getting screen blinking with the following message:

sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
vdd-1v8: voltage operation not allowed
sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
vdd-1v8: voltage operation not allowed
sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
vdd-1v8: voltage operation not allowed
sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
vdd-1v8: voltage operation not allowed
sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
vdd-1v8: voltage operation not allowed
sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)
vdd-1v8: voltage operation not allowed
sdhci-tegra 3440000.sdhci: could not set regulator OCR (-1)

This error is not fatal. Even devices boot up normally could see this log but this log should stop after boot. Did you keep seeing this log? Could you share full log with us?

Hello,

I have just restarted the Jetson TX2 and now I also get this error message and the jetson wont boot up…
Is there any solution without flashing the thing new?

Lack of video output is not a good indication since this may just be a configuration issue. If you can post a serial console log of the boot, then we could be more certain about what is going on. For serial console information, see:
http://www.jetsonhacks.com/2017/03/24/serial-console-nvidia-jetson-tx2/

Also, state if you are using a purely HDMI monitor, or if any adapters are used.