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Welcome!- What Hardware version is your router? Look at sticker under the router case.
- What region are you located?
APIPA comes from a device or network adapter that doesn't get a IP address from the DHCP services the adapter is connected too. Routers do NOT output or service this IP address to connected devices. This happens on the device themselves.
Possible causes of this:
Lan cable is bad.
Lan cable not fully seated into connector jacks.
Network adapter card is bad.
DHCP services is mis-configured or disabled ON the router.
Router/hardware is bad.
Try a different cable between PC and router. Ensure PC network adapter card is set for Auto Obtain IP addressing. Don't set a static IP address on the PC.
Try a different wired PC.
A factory reset should reset everything on the router back to factory defaults and should default to a 192 address. Review the user manual to check to see what the default IP address is to be sure.