Only powers on with previous SD Card installed

[pete]

Hi All,

Strange solution occurred this morning.

I've been trying out different OS on my PBP to see which I may stick with. So far have Mate Bionic image on the Emmc (from the tutorial instrcutions) and have SD cards with mate, chromium, manjaro.

Strangely I just shutdown from manjaro sd card and now the PBP will only power on with that specific SD Card in the slot.

i.e. I get 0 response (not even an orange LED) when pressing and holding the power button with any of the following attempts:

1. No SD Card boot - Ubuntu Mate from EMMC  (worked last night)
   
2. SD Card with Bootable Bionic Mate image
   
3. SD Card with Chromium Image
   

Where as
     4. Replacing the SD card with the same Manjaro image - boots straight away. Very strange.

Can anyone point me towards a reason for this so I can figure out what to do?

Thanks,
Pete