So if you had a static ip it would default back to dhcp mode which the router then may assign a new ip to it. I had weird issues with that on the stock firmware also. You may need to reboot your router to clear its cache and show the correct ip so you can access it. Or you can download the ipreporter software from bitmain's support area and run it then press the ip report button on the front of the miner control box it will send the correct ip to the software so you can verify it. Also the reset button is in the small hole on the front while the miner is running press a pin into it for about 10-20 seconds ...you will see red and green light flash.  This is still the may firmware with the cgminer replaced which has no affect on logging into it that is why I don't understand how you are locked out of it. There is no possible way the software I released can lock you out. I do know if you have it in a DMZ zone on your router you can get locked out and you have to reset it with the reset button. I don't know why this can happen I found that weird crap on the stock firmware when I was accessing it remotely. Don't know if bitmain somehow accessed it then or hacker but none of the default passwords would work until I did a reset by the front button then a few hours later it would happen again finally I took it out of the dmz zone.

That is a network issue of some sort. The router isn't getting the data it should be. What batch mini are you trying it on? and What version of the firmware did you last load to it?

When you try to login what does it do?  Also check your units IP to make sure it didn't change unless you had it set to static ip. Otherwise I don't know why you are not logging in. The only thing changed was cgminer and it has nothing to do with the units login or web gui. Sounds like a ip or a pc browser issue. All the login credential were never touched everything is factory user and passwords. Bitmain has a utility called iPreporter that you can run on your pc then you press the ip button on the unit and it will send the ip to the reporter or you can look for it under devices in your router  One of the first posts the user says it works fine so I don't know

Password is same as default user/pass  root  and  root  if you cant login clear your browsers cache. If you need to reset it press the reset for 10 seconds.   I don't know know why you cant login nothing was changed that would effect the login or a factory reset. If you changed your password on the unit before the upgrade then you would use that password.

No! i´m still having massive problems, reset, ip reset and other reset dont work. I´m lost!

Ohh you too?

I have working Batch 4 firmware for the z9 Mini unlocked with working temp and fan for the Batch 4 units.

I am not asking for dev fee and only ask for donations if you find it helpful for your Batch 4 Z9 mini. This is a one time fix no further updates for this firmware Efudd has the furture updates covered with his projects.

I am only releasing this because the fan noise on the batch 4's sucks when using batch 1 firmware.

Donations Zcash only can be sent to:  t1e4Dmr5RBgnWqTN2mAmZ6JzGavW7qxA4P1

THIS IS FOR Z9 Mini's ONLY WILL WORK ON ALL BATCHES 1-4

No Auto-Refresh:
https://drive.google.com/file/d/1fSrEopPWO5nChvphh7zvIT_3zj4DI4t5/view?usp=sharing

I am going to offer some updates but I don't believe they will be to the extent of Efudd's clocking and fan mods, mine will be mostly to
the web gui options and if possible the ability to change the HTTP port thru the web gui. This will make it possible to monitor remotely
thru a web browser when you have multiple units behind a router.

11/23/2018 3:48
Update: Added Auto-Refresh to the miner status page auto update status every 45 seconds

With Auto-Refresh
https://drive.google.com/file/d/1FioZnKLtVITpj9UfcDWlS1HnG5sVCvVV/view?usp=sharing