1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
Dismiss Notice

Welcome To SNBForums

SNBForums is a community for anyone who wants to learn about or discuss the latest in wireless routers, network storage and the ins and outs of building and maintaining a small network.

If you'd like to post a question, simply register and have at it!

While you're at it, please check out SmallNetBuilder for product reviews and our famous Router Charts, Ranker and plenty more!

N66 dead

Discussion in 'ASUS N Routers & Adapters' started by kneo, Feb 13, 2018.

  1. kneo

    kneo Occasional Visitor

    Joined:
    Mar 5, 2013
    Messages:
    43
    Yesterday, my old N66 just stopped working and now it's not powering on at all. I don't have access to a spare adapter to check whether it's because of the adapter or the router itself.

    I tried power cycling and pressing the power button repeatedly. It cannot be the power button as I always kept it on and switched the router on/off from the mains. The last thing I did was move from merlins to johns fork and set the Tx power to 100Mw instead of 80Mw. I monitored the temperature for a few days and it kept fluctuating between 52C-55C. I don't switch the router off much and it's constantly on for pretty long duration. The router itself is set up vertically with ample ventilation in the bedroom.

    What are my options? Can the router be dead because of overheating (which cannot be the case as I am not a power user and at best there are 2 phones connected to the router at the same time)? The router itself is 4-5 years old
     
  2. Please support SNBForums! Just click on this link before you buy something from Amazon and we'll get a small commission on anything you buy. Thanks!
  3. dlandiss

    dlandiss Senior Member

    Joined:
    Jul 14, 2013
    Messages:
    422
    Location:
    St. Louis, MO
    I'd put 4:1 odds on it being the power supply. The replacement does not have be labelled "ASUS" as long as it meets the voltage and connector requirements, and meets or exceeds the current capacity.
     
  4. kneo

    kneo Occasional Visitor

    Joined:
    Mar 5, 2013
    Messages:
    43
    For what it's worth, the blue LED on the adapter lights up well. I have a multimeter but am not sure how to check the output at the connector end.
     
  5. CaptainSTX

    CaptainSTX Very Senior Member

    Joined:
    May 2, 2012
    Messages:
    1,463
    Checking the voltage with a meter isn't enough. You need to test how much power it is capable of. This isn't possible with a standard multimeter.
     
  6. dlandiss

    dlandiss Senior Member

    Joined:
    Jul 14, 2013
    Messages:
    422
    Location:
    St. Louis, MO
    Most of the time if they fail the output voltage will be noticeably lower.

    My (good) N66 supply measures 19.5 VDC with no load. Select DC Volts on the meter, put the black (-) lead to the outer shell and the red (+) lead to the inner conductor. My version of the power supply has a very small connector (about 2.5mm OD like this one) so I had to place a narrow pin inside to reach the "red" feed.

    If you buy anything from Amazon note the "Support SNBForums" near the top right of this page--helps keep the doors open.

    CaptainSTX is correct that the ultimate test requires more hardware, but most of the time the above will be sufficient.
     
  7. CaptainSTX

    CaptainSTX Very Senior Member

    Joined:
    May 2, 2012
    Messages:
    1,463
    Back in the day when the Linksys 54G was the router to have the included .5 or 1.0 Amp power supply they came with seemed to be their Achilles heel. Once I replaced them with 2 Amp power supplies and I still have two 54Gs running strong as fast Ethernet switches in media cabinets. The failed power supplies always showed 12 volts when tested but wouldn't power the router.

    What the failure mode is on a power supply may depend on who manufactured it.

    The only for sure test is to borrow or buy another supply and see what happens. As has been stated a failed power supply is the most likely cause of the router's problem.
     
  8. sfx2000

    sfx2000 Part of the Furniture

    Joined:
    Aug 11, 2011
    Messages:
    12,388
    Location:
    San Diego, CA
    Odds are it's a bad power adapter - easy enough to source another one with similar specs...

    Offhand chance that it might be bad capacitors - easy enough to check by opening it up - if you see the little beer can things with crufty green stuff and corrosion...
     
  9. kneo

    kneo Occasional Visitor

    Joined:
    Mar 5, 2013
    Messages:
    43
    The voltage is quite steady at 19.4. No burnt capacitors too.
     
  10. dlandiss

    dlandiss Senior Member

    Joined:
    Jul 14, 2013
    Messages:
    422
    Location:
    St. Louis, MO
    That, plus your earlier note that no LEDs were lit on the router, suggests that you are one of the unlucky fraction for whom the power supply is not the culprit.
     
  11. john9527

    john9527 Part of the Furniture

    Joined:
    Mar 28, 2014
    Messages:
    5,225
    Location:
    United States
    Unfortunately that's not conclusive. A low voltage would say it's definitely bad, but good voltage doesn't mean its necessarily good (it could be drooping under load).
     
  12. kneo

    kneo Occasional Visitor

    Joined:
    Mar 5, 2013
    Messages:
    43
    But looks like there’s nothing else I can do with it. I will just give it to some enthusiast who’s interested in opening up routers for part scavenging
     
  13. CaptainSTX

    CaptainSTX Very Senior Member

    Joined:
    May 2, 2012
    Messages:
    1,463
    Buy a new ASUS router with the correct 19 V power supply. Try the new power supply with the old N66 and see what happens. If it works you have the choice of buying a new power supply for $10 or keeping the new router and putting the old N66 on the shelf as a spare or use it as an AP.
     
    kneo likes this.
Please support SNBForums! Just click on this link before you buy something from Amazon and we'll get a small commission on anything you buy. Thanks!