I was recently tinkering around in the router os in order to see why one of my wifi clients stop receiving internet. In doing so I managed to permanently loose my DHCP server. And when configuring my IP address manually setting to

192.168.88.2
255.255.255.0
192.168.88.1

I cant even enter the web setup by typing in 192.168.88.1

I have rest the router using netinstall. Im getting the message Secure your router ! Tap to hide this screen !
User admin
Password
Local ip 192.168.88.1

I have:
routerboard
RB 3011 Ui AS-RM
TP-Link EAP225

I was able to get back in after reseting the router through the touch screen three times. I had to guess the pin code was 1234.