Installed Jumpdrive 0.6 on SD Card, but Screen stays black and LED is blinking Green every second

[GregoriusT]

I tried charging the Battery, but it doesn't seem to create a different reaction.

The Screen stays black (not even backlit) in all cases, while the indicator LED is flashing green at one Hertz.

I watched a random Tutorial Video on this, and noticed that there is definitely supposed to be Screen activity going on. So something is wrong enough for me to report this.

When I plug it into my Computer, not even dmesg is reacting to it, as if it doesn't exist. I tried all my other USB-C Cables (including a super short one) and nothing is being recognized. Using other USB Ports also does not help, not even plugging it into my Raspberry Pi 4B helped (neither the USB 3 Ports nor the USB 2 Ports).

[craftyguy]

I see this sometimes, usually re-flashing it on the SD card (make sure to sync before removing it...), or trying a different SD card 'resolves' the issue for me.

[ntfc]

Had the same thing as OP, and in my case I was wrongfully flashing the .img.gz instead of the .img file to the SD card 🤦

[GregoriusT]

I did flash an .img File after using unxz to extract it, so I guess I'm gonna try re-flashing. There should be something about this Issue in the ReadMe, that tells about Blackscreen with Green Indicator LED. ;)

Also is it intended that image.gz and initramfs.gz are in the SD card?

Edit: Okay I got to the splash Screen but neither Telnet nor USB get recognition from my computer

[GregoriusT]

Great, now the Phone behaves as if the Battery doesn't exist...

Edit: Correction, since I needed to flash eMMC because the OS got corrupted I guess I have to install an OS to SD card in order to be able to charge the thing in the first place, since charging is controlled by the operating system, and the Battery probably drained in the week that I waited for support.

Edit 2: Feature Request, Battery CHarge Percentage Display in the Jumpdrive Splash Screen. That would be super helpful, especially if it contains a message that the battery might need to be fully charged.

Edit 3: Okay after charging the Battery everything worked and I was able to flash the eMMC. ^^