(2014-02-19, 22:17)hubaiz Wrote: You must wait 3-4 minutes till the firmware is updated. You will see on the MR3040 leds, after the firmware is updated they will go off and the router will restart.
Try updating with the sysupgrade image and with 'Keep settings' unchecked.
Many thanks for your very prompt reply, unfortunately the upgrade still doesn't work even with 'keep settings' unchecked (as attempted several times before).
The data ('Ethernet') LED flickers rapidly while the image is uploading, then more slowly for a minute or so, during which time the page header says 'Waiting for 192.168.0.1'.
Following this, the header reverts to '192.168.0.1', while the web page shows 'The CGI process did not produce any response'. The data LED now only flickers intermittently.
Using the alternative Chrome browser, there is a visible progress bar during the upload phase that reaches 100%, so it appears that the image is uploading correctly but is failing to install (the 'CGI progress no response' error message?).
At no point do the LEDs go off nor does the router reboot even after an extended wait (>20 min). I can log back into the router at the same address, which shows the old firmware still active as far as I can tell, and the old settings (e.g. previous SSID and network address) still present. Manually rebooting the router at this point brings up the previous firmware and settings as before.
I'll try again from another PC when I get the chance, just in case there is something about Win 8.1 it doesn't like, but the upgrade from the original TP-Link firmware to the last OpenWRT factory image went without a hitch using this same laptop (under Win 8.0). If it has any relevance, I have been doing this with the selector switch in the AP position, as for the initial installation.
I can't see that there is anything I've missed or am doing incorrectly, as the upgrade process should be effectively identical to the original OpenWRT installation, which was perfectly straightforward.
I must have now tried this at least five times overall, so welcome any further suggestions - it would be nice to get this working again!