RNS510 stuck on start screen

[johnboy]

Hi Can anyone help?
I have a 2015 Passat with a RNS 510. It is stuck on the VW screen and keeps rebooting.
I thought it may be a HDD so stripped down as per instructions found on the web, removed the drive I found it to be an SSD, and checked it on my computer it has 3 partitions and after a surface check with no problems was able to see the folders etc. It appears the drive is Ok but of course maybe corrupted.
There is a CDor DVD in the drive, must have been in there for ages as i can remember using it, I can hear it spin up when the unit is turned on.
I have no idea of hardware or Firmware versions as i can't get past the start up.
I would like to try recovery or reflash of the Firmware, can this be done from the SD card? Any ideas of how to proceed?
Thanks for any help.

[kamold]

Send me a PM with your VIN, I'll need to check the part number of your RNS510 to make sure you get the correct firmware to download.