Can 1 band of a dual-band WiFi card go bad?

Z

z8z

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Jan 22, 2016
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I'm troubleshooting a WiFi condition on an HP Envy laptop where the 2.4GHz band has extremely high ping rate and the 5GHz band does not.

Using Google's 8.8.8.8 DNS server as a benchmark
2.4 average typical time 2800-3000ms w/ packet loss
5.0 average typical time 28-36ms

-Signal strength indicator for both bands show full bars.
-Drivers cleared and reinstalled.
-Other devices are not having problems on 2.4GHz band.
-Windows 10 fully updated.
-No other wireless signals in range.
-No typical sources of interference.

At this point I'm starting to wonder if there might be a hardware issue.

Has anyone ever confirmed one band of a dual-band WiFi card going bad?

Thanks HF.
 
Absolutely. Each band uses a separate radio. One or both of those can go bad. 5GHz is also a less used frequency so there is a lot less interference. A lot of common house hold objects will emit interference into the 2.4Ghz range as well. Anything from your TV, microwave to your household phone. Even other WIFI devices connected will emit some interference. Depending on where you live ( apartments or close houses) your neighbors devices will also cause issues. If your Router or WIFI access point supports it, you can try changing channels to see if you get improvement. Even though there are channels 1-11 in the 2.4GHz range, there are technically only 3 separate channels.....1-6-11. All the other frequencies in between overlap each other.
 
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