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457 posts

Ultimate Geek


#150136 12-Jul-2014 11:44
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My old wireless modem/router was starting to struggle under the weight of the wireless devices connected (brought to a head when my son had a sleepover and everyone tried connecting to the wireless causing it to crash horribly).

I settled for Asus DSL-N55U which has been a joy to use....however I've noticed three laptops have issues. They connect to the wireless network fine but I get a little yellow triangle with a ! in the wireless notification and no internet access (or access to anything on the network e.g. or the USB hard drive).

Everything else works fine - i.e. Galaxy S3, S4, 2 x iphone 4s, 1 x ipod touch, 2 x laptops, 3 x desktops (wireless), 1 x desktop (lan cable), Nook, media player, 1 other andriod phone plus probably some other devices I've forgotten about

The three laptops that have problems run XP, 7 and 8.1 (Dell, HP, brand new HP). All three are different beasts (hardware, age, software). Can't even ping anything although ipconfig /all looks all ok

I've tried every setting on the modem, downgraded the firmware, reupgraded it, factory reset it.

On the laptop (well one of them as I figure if I can get one working then I should be able to get the other two to go), I've disabled DNS and manually assigned addresses (slingshot), reenabled it again, disconnected, reconnected, yelled at it (didn't help but felt better from doing it),

The funny thing is if I connect the three laptops using a LAN cable they work fine - no problems whatsoever.

I can't think of anything else to try so I guess I'm in the market for a new ADSL modem/router with wifi, gigabit LAN, and USB for media sharing. I'm a bit wary now as I thought the AAsus DSL-N55U was a fairly good model too (albeit slightly dated).

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  #1087664 12-Jul-2014 12:10
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Are you running 20Mhz channels?

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Ultimate Geek


  #1087673 12-Jul-2014 12:48
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Yes - 20/40 for 2.4Ghz and 20/40/80 for the 5Ghz


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Uber Geek

  #1087675 12-Jul-2014 13:04

Do the "not working" laptops get assigned a correct IP aggress, gateway address and DNS servers by DHCP? When the laptops network settings are set to "obtain IP address automaticly"? Check how many IP addresses are assigned by your router. If the ip address "pool" size is too small, then some devices won't be able to connect.

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  #1087681 12-Jul-2014 13:27
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I have the n55u and initially regretted buying it because of the flaky WiFi. It was only fixed when I updated the firmware. Firstly to beta firmware and just recently to a stable Asus release

My current firmware version is now and has been working well. If you do want to update you have to download the firmware from the Asus support site and then point the router Admin page to it. It doesn't go searching for it itself. You can back up your settings before applying the update and restore them afterwards because the it takes a factory reset to apply. Still need to enter ISP details and Wi-Fi ssid/password when it reinitialises though.

I have discovered that Asus do great hardware but don't back it up with great firmware or software.

Areas of Geek interest: Home Theatre, HTPC, Android Tablets & Phones, iProducts.

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  #1087716 12-Jul-2014 14:15
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logo: Yes - 20/40 for 2.4Ghz and 20/40/80 for the 5Ghz

For a start change this to 20Mhz. 40Mhz on 2.4Ghz is unsuitable for many urban environments due to noise and will result in worse performance that 20Mhz channels.

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Ultimate Geek


  #1087722 12-Jul-2014 14:28
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Aredwood: Do the "not working" laptops get assigned a correct IP aggress, gateway address and DNS servers by DHCP? When the laptops network settings are set to "obtain IP address automaticly"? Check how many IP addresses are assigned by your router. If the ip address "pool" size is too small, then some devices won't be able to connect.

Yes they get a correct IP address any everything - when I log into the router the laptops appear as normal.

I've got the ip address range from to which should be enough (although I noticed I had 16 devices connected just before but still well below the assignable ip range).

Just had a mate pop over with two laptops , an android tablet and his android phone. The two laptops (one running Windows 7, the other Vista) had the same problem, the tablet and phone connected fine.

I connected my old Belkin Share N300 and everything connected fine (laptops, phones, etc...). The Belkin has it's own issues but at least everything connects.

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Ultimate Geek


  #1096260 26-Jul-2014 17:25
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Update on my position.

Returned the Asus to PB Tech (3 year warranty) but they had no problems connecting with it. D'oh

Bought a D-Link DSL-2544N as it provided the specs I wanted (gigalan, USB etc....)

HP Pavilion which wouldn't connect to the Asus connects fine......but the bloody HP notebook now won't connect to the D-Link (it won't even detect it)

After a few hours of fiddling around with things worked out the following compromise:

1. HP notebook - change the channel from 11 to 6 - detects and connects to the D-Link

2. HP Pavilion - disable Wireless N on the wireless adapter and it works with the Asus (albeit at max 54Mbps speed)

I feel these are workarounds and not real solutions to the problem at heart but at least everything is working for now.

On another note, I've had no success with connecting to the 5Ghz wifi on either modems. The D-Link won't allow the same SSID so that makes it easy to know if you're connecting to the 5Ghz band. That's another story about actually getting the band to appear (mixed success but it may be due to the wifi adapters in the laptop but even when I could connect, the connection was flakely)

Anyway, that's a few hours of my life I'll not get back. Feel like I should do something productive now like a load of washing


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  #1096265 26-Jul-2014 17:45
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Bit of a run around but not every shape will fit in the hole. Good to know you got some work arounds :).
I need to get a load of washing done too. I think i will do that now.

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