RT-AC5300, wireless devices could not connect to both 5GHz channel

[Henry Choi]

I am having issue with my RT-AC5300. I have recently upgrade to Merlin 384.7 and found out both 5Ghz channel does not work properly (2.4Ghz works fine). I can see the SSID but I could not connect to it. It either keep show wrong password, no internet access or could not get DHCP from the router.

I have done factory default (both restore and initialize). Still could not fix the issue.

Is there anyone solved this issue before? Please advise me how to fix it.

 

[Henry Choi]

Hi,
Thanks very much for your reply.
I have tried to flash the firmware to both v384.5 and v384.4_2 but no luck.
My laptop display a message said "Can't connect to this network".

 

[Grisu]

Hi,
Thanks very much for your reply.
I have tried to flash the firmware to both v384.5 and v384.4_2 but no luck.
My laptop display a message said "Can't connect to this network".

dont use special characters in password and SSID only '_' or '-'

 

[Henry Choi]

I think I found the issue.
My 5G channel is sitting at 114 degree.
Current Temperatures: 41 °C - 114 °C - 52 °C

I will start another post and ask about reduce the 5G temperature

 

[Grisu]

I think forget it its dead with this temperatures.
If there is no return you could open it, remove cooling plate, remove metal shielding and have a look if the thermal strips are located well.
But as said these temps are probably to high for the WiFi chip to survive.