cant ping domain controller

I have a user that can't ping the domain controller, but I can ping every other server on the network, using a dynamic IP.  If i use static, it works, I can ping the server.

I tried flushdns, registerdns, renew, disabled and enabled the nic, nothing.

It has something to do with my logon script possibly, as the script fails to run everytime.

The user doesn't have any special GP's applied, same as everything else in his department.

Any idea's what to do to fix this issue?
DanNetwork EngineerAsked:
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DanNetwork EngineerAuthor Commented:
I logged in today with his account and it worked.  I don't get it, perhaps there was an issue with the server, as I restarted the server earlier this morning.  What's strange is from my PC, i was able to ping the DC just fine last night.
I think its a server or client issue, I've encountered this king of situation, after I change a new power supply, the problem was gone, I think its because of the electricity, the wattage or amps grew's at night  and if you don't have a stable psu then this things would happen again.

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DanNetwork EngineerAuthor Commented:
you're joking, right?
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no, I'm not, that happens to our company and I was the one who solved it.
DanNetwork EngineerAuthor Commented:
well, I didn't have to change the power supply.  I just left the issue over night, I restarted my DC server which is a VM, all my servers are VM's, and then restarted the client one more time and everything just worked this morning, so it's strange.  I don't think there was anything to do with a power supply in this situtation.
When the current change, the psu voltage change also, and so it does triggered the system parts, that's why it worked at night then on the morning it just fine also, possible during the issue or problem, the current change, ahm, forgive me if I have mislead you but my experience is better than my understanding, lol
DanNetwork EngineerAuthor Commented:
well, i want to give you the points for trying to answer, but I'm sure it wasn't the PS.
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