Hi,
after a long investigation and thanks to the pro active help of the Netherland's Thecus support, I was finally able to solve the problem:
It's not a simple task and you need additional support files from Thecus. Thecus Netherland's (support_nl@thecus.com) provides these files on this server for download:
www.thecusparts.eu/temp/USB_Default_Patch.zipHow to reset the MiniNAS N0204 to factory defaults (this solved the problem of my corrupted LogIn pages):
1) download the ZIP archive from Thecus server (link above)
2) unzip and copy these files to an empty(!) USB stick to the root - keep the folder structure as it is in the ZIP.
3) turn off the N0204
4) remove hard disks
5) insert USB stick into the front(!) USB slot
6) power up the N0204 and wait for ~70sec for complete bootup (you may ping to check)
7) power down and insert the HDD - keep the USB stick still inserted(!)
8) power up again and remove the stick after ~120sec.
The N0204 is now reset to factory defaults, this includes DHCP is enabled. The N0204 may come with a different IP if a DHCP server is reachable. If not, it will switch back to fixed IP: 192.168.1.100 after ~ 60sec.
You need to scan the the N0204 with the Smart Utility in order to identify a DHCP assigned IP address. When the utility has detected the the N0204 you need to run the full setup again - this will not destroy your server content.
Please make sure that you have downloaded the most recent firmware (3.00.07F). I have successfully performed the reset with both, FW 3.00.07
E and 3.00.07
F (remember, you need to copy the firmware to the Smart Utility Folder and you need to rename it to: firmware_N0204 - no suffix).
The Smart Utility will detect your NAS, will run the full procedure and the system should come up with a working login page (default passw.: admin).
Finally you need to configure the entire system again (ACL, Accounts, system etc).
Please note: I assume that the corrupted login page was caused by disabling the HTTPS service - this is neither officially verified nor confirmed yet - I recomment to keep it enabled as the default has configured it to.
Kind regards, Hartmut
Again: Many thanks to NL Thecus support!!