Need Ipconfig /renew to get an IP after reboot
 

This is not a dhcp server issue because all existing PCs are fine.
This is not hardware issue since it happend on different PCs with the new
image.
I setup NIC speed as 100/Full like all other PCs.
After log on local admin and run ipconfig /renew, I get the IP.

I ping this PC "ping xxxx.xxxx.xxxx.xxxx -t" when it reboots. Then I get
something like below. Any suggestions?

Request timed out.
Request timed out.
Request timed out.
Reply from xxxx.xxxx.xxxx.xxxx: bytes=32 time=1ms TTL=123
Reply from xxxx.xxxx.xxxx.xxxx: bytes=32 time=1ms TTL=123
Reply from xxxx.xxxx.xxxx.xxxx: bytes=32 time=1ms TTL=123
Reply from xxxx.xxxx.xxxx.xxxx: bytes=32 time=1ms TTL=123
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Request timed out.