Power / Diag. LED is blinking.

Recently my E1200 stopped working. First, I tried ''power cycling it and now it takes me to the firmware management page I pressed cancel, rebooted again at firmware page.

I guess firmware is corrupted. Tried replacing/upgrading firmware but connection always disconnects, tried different ports, cables and reseting it, nothing happened.

I got it to install firmware after many tries and it did it successfully. After it booted up, I logged back in to reconfigure it changed IP parameter (just changed from 1.1 to 2.1), saved conf. and it restarted, started blinking again.

Firmware I downloaded is correct for the model.

I̶ ̶d̶o̶n̶’̶t̶ ̶k̶n̶o̶w̶ ̶w̶h̶y̶ ̶i̶t̶ ̶i̶s̶ ̶b̶r̶i̶c̶k̶i̶n̶g̶ ̶i̶t̶s̶e̶l̶f̶ ̶c̶o̶u̶l̶d̶ ̶i̶t̶ ̶b̶e̶ ̶h̶a̶r̶d̶w̶a̶r̶e̶ ̶r̶e̶l̶a̶t̶e̶d̶?̶ ̶i̶s̶ ̶i̶t̶ ̶f̶a̶i̶l̶i̶n̶g̶ ̶I̶ ̶d̶o̶n̶’̶t̶ ̶k̶n̶o̶w̶?̶

EDIT: So I reinstalled firmware again and now it works. reconfigured it again, now it works mostly. DHCP isn’t, but that is just mild annoyance/inconvenience at least I can use the %#*@ router.