Esxi seems unresponsive

We have a stand alone ESXi4.1 host. All of  a sudden the ESXi host failed to ping. When logged through ILO and rebooted the host. After rebooting the host in the console I find
"Network adapter is not compatible kindly check with VMware Hardware compatablity list" and replace. The ESXi is unable to ping even after the reboot.
I just like to know how all of a sudden the Network adapter becomes uncompatible after being worked for so many days?
Need to know how to resolve this issue? Thanks
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
what is the network interface?

what is the server, is it on the HCL?

have you checked the physical network connection? have you replaced the network patch cable?

what speed have you set the port to?
cdjcConnect With a Mentor Commented:
Failed network adapter, or has come loose in the PCI(e) slot possibly.

If it's not an on-board NIC, try reseating it, if that doesn't work or if it's on-board, replace it or the mainboard.

If you're not comfortable doing any of that, boot the host from Live Linux disc of some sort, and test the network connection from there.  If it still doesn't work, start looking at faulty hardware.
jmohan0302Author Commented:
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