On brand new HC2 4.056 i have got "503 Server Unavailable" page on first boot.
I tried many different solutions:
- reboot by power button;
- reboot by detach power plug;
- restore to factory default state from the recovery mode;
- change the browser (Firefox, Safari);
and all combination of this one.
I was found this topic and was very upset - looks like only need to replace the device.
But I found that the API (http://HC2_IP/docs) is fully functional. For example, GET /settings/info and other methods.
So the base system works fine. Thus, the chances of a solution to the problem is.
After several hours of search (thanks to Google) and meditation - a solution was found:
1. Authorize in system (we remember that you need to use default account "admin" with password "admin") via the API (http://HC2_IP/docs) by calling any method of the API, which requires authorization. For example, by pressing "TRY IT" on method GET /settings/network.
Do not close the browser window!!!
2. After the successful authorization (we saw proper network info) IN THE SAME BROWSER WINDOW AS IN STEP 1 enter in browser's adress line: http://HC2_IP/services/startUpgrade.php
3. IN THE SAME BROWSER WINDOW AS IN STEP 1 and 2 enter in browser's adress line: http://HC2_IP
4. You should see the process of updating the system. Upon its completion and restarting the system, the error "503 Server Unavailable" no longer appears.