[oliverrr]

Instead of factory-to-ddwrt I have used the other one. The wrong one since it's my first time to go from default to open firmware. (ftp://ftp.dd-wrt.com/betas/2017/11-16-2017-r33772/linksys-wrt1900acs/)

I tried the Power Cycle the router three times method describe here. https://www.dd-wrt.com/phpBB2/viewtopic.php?t=311117
Nothing happened. My router won't roll back to Linksys firmware. Tried doing it while my laptop is connected to router via LAN cable. (not sure if that detail matters)

I tried telnet 192.168.1.1 which is describe here
https://www.dd-wrt.com/wiki/index.php/Telnet/SSH_and_the_Command_Line. I got this error Could not open connection to the host, on port 23: Connect failed


I want to try SSH but I do not understand it. My networking skill and knowledge is 2/10. I have PuTTY but I can't seem to grasp the instruction here https://www.dd-wrt.com/wiki/index.php/Telnet/SSH

My router is Linksys WRT1900ACS version 1. By the way, before I tried above methods of reverting to default firmware, I panicked. I hold the reset button for about 20 secs (not sure if that detail matters).

[spuriousoffspring]

The easiest way is to manually switch partitions via power switch. It will work, but timing is important.

With router OFF, turn ON
Wait 2 seconds
Turn OFF
Turn back ON
Wait 2 seconds
Turn OFF
Turn back ON and let router boot.

It should be in alternate partition.

[myersw]

The above does work. You need to get the timing right and have a little patience. It seems like a really long time before the router comes up after the switch sequence.

[oliverrr]

yeah.. on - off cycle worked. just learned that timing is the key.

[Usori]

Can anyone explain the timing in more detail? How long do you leave it turned off for? Or do you immediately switch it back on? Are you timing it based on the lights? I tried timing it for exactly 2 seconds of power on several times, trying to vary it up. Also tried the same thing with varying amounts of off time. Cant figure it out. If my other partition is good, is this guaranteed to work if I get the timing right?

I have tried dozens of times with no luck. Don’t have Linksys Venom factory firmware on other partition. Current bricked partition is the full dd-wrt flash, and the good partition is the first dd-wrt firmware i flashed from the stock Linksys Venom firmware.

I think I may have disabled Telnet and SSH entirely because I was trying to be paranoid about security. So I guess I have to get into it via USB to TTL serial cable? Got one ordered on Amazon, so hopefully tomorrow I will get it fixed anyway, but would be nice to get this partition switch to work.