Chrome cast

[Tys41]

Hi all,
I have a DGND 3700v2 N600 dual band wireless modem router (older model I know)
Can’t get my chrome cast to recognise it? Been told it should work.. Any tips? Or am I wasting my time?
Thanks in advance

[plemans]

1. Firmware on the router?

2. are you using the same ssid name for both 2.4ghz and 5ghz? if so, make them different.

3. Try changing wireless channels. 1-6-11 for 2.4ghz. 

4. If you hotspot a phone, does the chromecast connect? Just trying to make sure its not a chromecast problem