I have some experience, I was a IT technician for a "fruit" company few years ago so I think I can do it.
I understand the whole process of setting the parameters, I was doing that when it happens. I did factory reset and then setting parameters when I lost connection and after reboot there was no SSID to find anymore.
What I don't understand is:
1. Pull the test point TP_IO9 ? Like pull it UP? Or connect it by alligator to TP_GND?
2. Where is the reset test point?
I was reading your posts but you never said exactly how to do it, if you don't want to post it here just send me an email.
some informations here that I have been reading:
Jerry was talking about it here:
Almost same issue like mine:
I'm also confused of the behavior of the serial port.