Question Internet Disconnecting Every ~30 seconds

Mar 31, 2020
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I have this annoying problem that my internet connection will totally gone every 30 seconds to 2 minutes for 1-5 seconds. sometimes it happens 3-5 times in 20 seconds.

OS: Windows 10 Pro Version 10.0.18363 Build 18363
Switch: D LINK DES 1008a (wired)
Motherboard: Asrock B450 Pro4

What i've tried:
  • Using different ethernet cable (problem still occurs)
  • Using my cellphone's data by USB Tethering (problem totally gone)
  • Restarting my modem (problem still occurs)
  • Making sure that the ISP is not behind this
Could it be;
  • the ethernet port on my motherboard is faulty?
  • the switch itself is broken?
  • windows or software related?
  • or something else?
I'm currently deciding between buying a new switch / router or claiming my motherboard warranty. both would take a long process in my country because of the current worldwide issue.

feel free to ask me for more infos or personal troubleshoot!

thank you in advance!

View: https://imgur.com/1Ixq7eT