can not boot pinebook pro from recent production run

[justwantin]

Last week I recieved a pinebook pro. 2 days ago and was able to boot into manjaro. I then tried tried to install slackware as per the slackware aarch64  install instructions which seem relevant to earlier pbp's but not to the latest production run. Switch 24 is now a dip switch in a different location and it appears that the slackwareaarch64 flash-spi-pinebookpro.img does not work.

On the slackwarearm forum I was told by one member that he also has a pbp from the most recent production run and that the slackware installation would not work one the new pbp and that he installed by first using these instructions Which gave him tow-boot. I gave that a go but couldn't boot from the sd card. Used a brand new 32g class 10 card and a 16g class 10 card from pinestore. I also tried a couple of sd cards I had previously used to boot bananapros but could not boot from the sd card.

I have checked the ribbon cable sd slot connection and its good. I've tried the dip switch in both positions and with/without emmc installed. I've used the restore/reset buttons as well. 

As it turns out I can no longer boot into manjaro with dip switch 24 in its original position (see below) or indeed switch in the opposite position. I'm at a loss as where to go next. I've read some posts about this problem but without being able to boot from an sd card they weren't much help. Any suggestions would be most welcome.