Limited Network with New Router

First of all, AGFDEJEIORJKLSSDJKLAJIOWERJOIJIOGAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH. Alright, now that's out of my system.

Basically, when I stick in a new router, it gives me limited connectivity and my old router works fine. I've RMA'd the new router twice now, once for overheating, once for dropped signal, and now it's giving me this. I have reason to believe it is software based, but if anyone could help me fix this problem, it would be greatly appreciated. I've been trying to scour the web for solutions over the past few months, and I have come up with nothing. On my old router, wireless works fine, but wired internet has the same problem. Weird.

Now that the story's over, here are the main points:
1) The new router shows "DHCP connection failed." when hovering over the LAN icon.
2) Comcast denies all allegations that it is their fault. The modem is apparently connecting fine to their servers.
3) I have exchanged the modem at Costco.

I have already tried resetting to stock, all those quick fixes. If there's anything in depth I'm missing, please let me know.

I'm exhausted, exasperated and frustrated. I've spent the past half a year looking for an answer, and I just cannot get it working. I can't return it after the first RMA, because it took 2 weeks to come back, thereby screwing over my return.

Alright here are some details about the equipment:
1) The modem is a SB6121.
2) The old router is a D-Link DIR-825.
3) The new router is a RT-AC66U.
4) My PC has both a wired and a wireless connection.
5) The reason for replacing the DIR-825 is the quality of the wireless is slowly degrading.

I would hit more keys, but I'm attempting to keep this fairly civilized.
I'm pretty sure this isn't computer based either, as I have bought a brand new computer in attempts to fix the problem (custom built), and same problem arose. It's also frustrating that the router has little documentation and very few people have had issues with it. Also, when I factory reset the RT-AC66U, it sometimes will work for a couple days, before it will start having the same issues.

Hi al4nw31,

You have explained your issue very well; therefore, it almost certainly has to be the new router. With that said, I will start off with a simple recommendation and see where that leads. So, have you downloaded the latest firmware for your new router? By sheer coincidence the latest firmware update was just made available yesterday (9-12-2013):

RT-AC66U - Networking - ASUS

al4nw31 said:

1) The new router shows "DHCP connection failed." when hovering over the LAN icon.

Click to expand...

Can you upload a screenshot of this at all? I am almost certain that this is your issue.

http://www.eightforums.com/tutorials/2598-screenshots-files-upload-post-eight-forums.html

Also can you follow this tutorial and upload your IPconfig since this could backup my theory as to what the cause is.

http://www.eightforums.com/network-sharing/26581-network-posting-tips.html

Many Thanks,
Josh

This router the AC66U does have compatibility problems with certain types of wireless NIC's. The latest firmware may help but I don't see any real compatibility updates there.

I'm running this router in A/P mode, it works fine with my PCE-AC66U NIC which is made to work with this router. It also has no problems with my wife's IPad.

There is no direct fix for the problem, and it's not a Windows 7 related problem, just certain NIC's aren't working well with this new wireless standard although it may help to change the advanced settings of the wireless NIC, > Properties, advanced tab, but no idea which setting may have an effect because the settings are different for each NIC.

Best bet is to simply upgrade the wireless NIC to one that is compatible with the new 802.11AC. Either PCI-e or USB.