@TP_VR400 

Could you provide us some more information on this

Have you set the SSIDs differently between the 2 and 5Ghz ranges?  Also what encryption are you using?

Lastly what channel are you broadcasting on?

any screenshots you can add would also help

@Philbert 

Hi,

I have set different names and different pwds

2G

Channel - 1

Width - 20MHz

5G

Channel - 36

Width - 80MHz

I also tried them with 'Auto' settings.

security - WPA/WPA2

Thanks

@TP_VR400 

Try dropping the channel width to 20mhz and setting the security type for WPA2 AES   

If that works increase the width to 40  test   80 test

@Philbert 

Thanks Philbert,

It works at 20MHz. Not at 40 or 80.

Thanks.

@TP_VR400 

Umm thats curious

Try switching it to Channel 153 or 157   and set for 40mhz and retest this..   If that works try 80mhz

You are using 36 at present which is the default for most ISP routers so it could be quite congested with your neighbors, heading to the top 153 / 157 range would rule that out.

The problem is as you increase the channel width you will get more interference.   20mhz will use just channel 36  :   40mhz will use  36 and 40   :  80mhz will use 36, 40, 44 and 48

Moving to the 153+ range is still a supported 5Ghz channel but very few people use it, most just stick to the 36-48 range.  

Much as its working now, the fact its only on a 20mhz width would restrict your Wifi speeds greatly, ideally you want the full 80mhz channel if that is possible. 

Would be worth trying..

Best of luck!