DHCP getting self IP address and manually too has no response.

I have 13" White MacBook Pro didn't  get an IP via DHCP from my USB Modem. It gives the self assigned IP 169.254.X.X. and manually too not working. Please help me what should i do for my internet connection.

There's no common issue.
All a self-assigned IP address means is that DHCP did not assign you an IP address.
This can occur for a variety reasons, from the DHCP server only issuing one address per network (many DSL modems do this) to running out of addresses (many cable modems will issue up to five but no more, and many routers will not issue more than ten.)
The brute force fix attempt is, as mentioned above, to power off your Macs and other machines, power off the router, then power off the DSL or cable modem. Wait a minute, then power them up in reverse order (DSL/Cable modem, then a minute later the router, then a minute later your PCs/Macs.)

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