Thanks,
I tried doing that. I shut down my NAS, took out all my HDD, took out the working USB.
Created a new USB using the 1.03 loader (that took ages as win32 DIskImager kept giving me an Error 5) and then all of a sudden it worked.
Stuck in 4 old HDD, booted, used find.synology.com to find the NAS, then tried to update to 6.2.3-25426, which said, it worked, then the NAS rebooted but I couldn't get synology to work.
I then shut down, took out the USB stick, put the old one in, booted and it told me it recognised new HDD and if I wanted to recover, stupidly, I said yes, it rebooted but now even though find.synology.com can find the NAS, it won't connect.
I then shut down, took out the old HDD, put the working ones in and now when I boot and find.synology.com, although it finds the NAS, it finds 4 of them, on the correct IP addressed but two of them have DSM version 6.2-23739 and two of them have DSM version 6.1-15284 (see screenshots below)
No matter which one I try to connect to, I get a timeout.
I'm unsure as to what to do next...any ideas?
I took a full back-up before starting, so if I can get a working 6.1.7 again, I suppose I can restore from the backup?
Thanks