Usb port powered?

is it possible to power stuff (not transfer) from the usb port on the back, or is it completely inactive?

Haven't tried it but have seen reports of some using it for such items as USB fans etc.

Similar Messages

  • USB port powered while sleeping?

    Does anyone know if any of the USB ports on an Intel 24" iMac are powered while my Mac is sleeping? So something like my phone will continue to charge while the Mac is asleep?
    Thanks!

    HI,
    *Charging Tips*
    "iPhone 3G and iPhone 3GS cannot be charged with a FireWire power adapter or FireWire-based car charger. Make sure your computer is on while charging iPhone via USB. _If iPhone is connected to a computer that’s turned off or is in sleep or standby mode, the iPhone battery may drain."_
    From here: http://www.apple.com/batteries/iphone.html
    Carolyn

  • USB Port: Powered or Just Data?

    Does the USB port on the MacBook Air provide 5VDC power? I ask this because long ago, in a distant galaxy, I had a Dell laptop. It did NOT provide power to the USB port - only signal. Thus, any peripheral expecting to be run from the 5V power of the USB port didn't work unless a powered hub was connected to it first. I'm looking at purchasing a piece of equipment that the manufacturer states "no external power supply needed; power is provided by the USB port".
    Anyone know for sure on this?

    That USB port provides power. Click here for more information.
    (41814)

  • Keep USB ports powered when PC off

    Hi,
    I got my first iMac a few days ago and am missing a feature that my PC had. I have a razor mamba wireless mouse that charges in its own dock via USB. I would also like to charge my iPhone 4 from my iMacs USB ports over night. But when I turn off my iMac the USB ports power down, unlike my PC where the USB ports would remain active and charge my mouse over night.
    Is there any way I can charge my USB components overnight without leaving the iMac on?

    Hi AlmightySi
    Welcome to Apple Discussions
    A Self-powered USB Hub or Computer Sleep, an iMac can sleep 24-7 for weeks without a problem.
    Dennis

  • Is USB port powered when device is ejected?

    I have several battery-powered USB devices, such as iPod Touch, that get their battery charge from the computer. If I eject the device from the desktop, will they continue to receive a charge?

    Unmounted but still connected - they will draw a charge until the battery is full.

  • IPhone 4S won't charge anywhere in my house if its powered on, only off - but will charge by USB port in my car. Help!?

    I know part of my question is a repeat of others, but - I can't find one on the boards that matches mine exactly.
    Basically, many months into having my phone (I'm updated to the current software), my phone is refusing to charge by wall sockets. I thought it may have been a specific socket, so I tried others. No luck. I tried connecting to one of the power strips I my room, again, no luck. With my last attempt, I plugged it into one of the USB ports on my new power outlet block (has two USB ports), AGAIN, no power.
    I switched and also tried 4 different cords. No change.
    At this point, after an hour of extreme frustration, my phone had died. So, I plugged it in for you-know-what's & giggles. Within about 15 minutes, my phone mysteriously powered on with about 5% battery - but, NO CHARGING SYMBOL AND NO CHARGING ONCE ON! I even tried almost every outlet, in a two story house, while switching between outlet, power strip, and USB ports on the power block - to no avail!
    I was stunned, so as a last resort I went to my car. I have a 12v universal USB charger, as well as a USB port that is built into the car. They work...
    As you can surely see, I'm extremely frustrated. Since my fiancés iPhone is broken, and my mother (whom I do not live with) is a severe heart patient, and currently sick - I need my phone on & running out to let the phone charge in 20* weather and going out to check it every hour, is not ideal.
    So, ultimately, if anyone can explain to me if they believe it could be a circuitry issue, battery issue, or phone issue - also, explain as to why it will charge by two methods in my car, but not any means in my house; I would be greatly appreciative!
    Thanks!
    Typing this as my phone is about to die -_- .

    Got the same problem
    last night I tried to charge my iPhone 4 with my ps3 USB ports, suddenly it began to stop charging and start again like on/off so i unplugged it from my ps3, now it wont charge with my ac adapter or my macbook, however it charges on one computer that ive build my self. if my phone turn off due to 0% battery it will charge anywhere until it got 5% power
    since it charges means nothing is wrong with the phone i think, so I will buy a new USB cable, or borrow one to see if it works. most likely the usb cable causing the problem for both of us

  • Printer connected to Airport Express USB port won't come online after firmware 7.6 upgrade. I've tried backing up to 7.5.2, but it still shows offline. It is a Canon iP4600 printer and I'm running OS 10.6.8. I've powered everything down and still no go.

    Printer connected to Airport Express USB port won't come online after firmware 7.6 upgrade. I've tried backing up to 7.5.2, but it still shows offline. It is a Canon iP4600 printer and I'm running OS 10.6.8. I've powered everything down and still no go. I've connected the printer directly to my MacBook's USB port and it works fine. Any suggestions?

    I have an iP4500, which I assume is quite similar to your model.
    I had to reset the printing system to get things printing again. Only takes a few minutes and no problems at all since I did it a week ago or so.
    Plug the printer into the USB port on the Express and restart the printer.
    Open System Preferences (gear icon on the dock) and then open Print and Fax
    Right-Click in the printer area on the left and select Reset Printing System
    Then click the + (plus) button at the bottom of the printer list to install the printer again.

  • How many amperes can be powered by the USB Port

    I'm looking for a new USB Powered HD (in the 160-250 GB range) that my AirPort Extreme's USB port can power.
    My current LaCie USB Powered Mobile Harddisk ( http://www.lacie.com/uk/products/product.htm?pid=10651 ) can't get enough power from the AirPort Extreme (n) to run.
    QUESTIONS:
    How many amperes does the AirPort USB port "support"?
    Do you have a USB powered HD that works fine with the APEBS (2.5" in the 160-250 GB Range)? - Make and model please?
    Thanks in advance.

    Hi Allan,
    You mention you wish to use the older SKU  p/n SRW224G4P, which has been refreshed and  replaced by  SRW224G4P-K9-NA
    .Here is the EOL notice fior the SKU you detailed;
    http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps9967/end_of_life_notice_c51-626527.html
    Why not avail yourself of the newer 300 series switch such as  SRW224G4P-K9-NA .
    I am using beta code version 1.1 code on my unit.
    Version 1.1  will be Generally Available  at the end of this month ( fingers crossed),  and Version 1.1 firmware supports CDP.
    See datasheet for the new product, generations ahead of the old p/n that you mentioned.;
    http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps10898/data_sheet_c78-610061.html
    Anyway the  AP1240AG  isn't a pre-standard device but supports standards based  802.3af, hence i really see no benefit in using the older product..
    Datasheet on the AP1240AG correlates with your data, maximum power drawn is 12.4watts.
    Allan,  your calulations seem spot on.
    SRW224G4P-K9-NA as well as the older switch you mention both support aPOE  power budget of 180W.
    I personally like to be slightly conservative in terms of loading the switch up..  I prefer  to spread the load between switches if i can.
    But the GUI of the 300 series switch will show the power drawn by the devices.
    The device circled below is a AP1142 with wireless-a turned off.
    Have fun,
    regards Dave

  • USB port "Over Power" with externally powered device

    I have a Macbook Pro that's about 1.5 years old. Shortly after I bought the Mac, I converted my external hard drive (by Fantom Drives) into the backup for my computer. It worked fine for about a year, and then around six months ago I started experiencing problems.
    First, it would unexpectedly disconnect from the computer, causing error messages. Then, when connected the drive to my computer (usually on the right side, since that seems to make a difference from what I've seen) I began getting messages that it was drawing too much power from the USB port, and therefore the port is shutting down. This is despite the fact that the drive is plugged in and drawing its own power (as evidenced by the fact that I can turn it on when it's not connected to the computer).
    With my upgrade to Snow Leopard, I'm getting slightly differently worded but same in effect messages. Is this a sign that something is wrong with the hard drive, or is it a problem with my computer? I don't have another computer in my house to check to make sure it works ok on other computers, but I will try that as soon as I can.

    Thanks for the welcome!
    Yes, I get the same error, no matter what combination I try. Once it worked if I powered it up, connected it to the computer (followed by the error message), disconnected the USB cable from the drive and reconnected. Bizarre, I know, but I was trying anything and everything that I could think of. At least that one time, I was able to back up the computer (about 20 days ago, according to my Time Machine messages).
    Also, the ports don't seem to be affected permanently--I can still use my printer, USB keys, etc. on them no problem.

  • Help my MBP 2011's USB ports only work with powered devices

    Hey.
    My USB ports are only working with powered devices ( such as an interactive white board) they are not working wiht a USB modem, it picks up but doenst have the energy to dial out. it also doesnt work with a flash drive.
    this is only recent after i updated non vital programs such as printer things.
    now the other problem is that i have not updated this too recently but i dont mind losing some info.
    ps. i have done all of the restarts such as smc, ram. pram. the only thing i have not done is take out the batt. but thats becuase its really hard to do and there are warnings all over it saying dont remove.
    p.p.s i am running snow10.6.8
    Please help becuase i need it to help teach some of my stundets and not being able to use a USB or the internet to research is impeeding my planning.
    Thanks so much in advance
    Andrew

    One final detail. it is a 2011 early model. if there is any more details that you want please ask. i am very desperate because i dont want to take it to apple unless i have to.

  • To add a 6 TB G-Raid (Mac os extended) ext drive to a 2Tb time capsule, using a powered usb with the TC usb port. Using the airport utility 5.6 on iMAC (10.7.3). Went to manual setup,then disk. Have options of the TC

    Want to add a 6 TB G-Raid (Mac os extended) ext drive to a 2Tb time capsule, using a powered usb with the TC usb port. Using the airport utility 5.6 on iMAC (10.7.3). Went to manual setup,then disk. Have options of the TC or 6TB. Won't allow update to the 6TB

    4Buck5 wrote:
    Want to add a 6 TB G-Raid (Mac os extended) ext drive to a 2Tb time capsule, using a powered usb with the TC usb port. Using the airport utility 5.6 on iMAC (10.7.3). Went to manual setup,then disk. Have options of the TC or 6TB. Won't allow update to the 6TB
    I am not 100% what isn't allowed.. but I am assuming you want to spread the backup across the two disks.. internal TC and 6TB external.. this is not possible.. It has to be one or the other. TC has no way to build a raid JBOD or anything else. Nor would you want to as that is the most likely to fail and kill your data.
    Let me add, backing up 6TB over USB on TC.. will be the most excruciating experience of your life.. cf child birth or passing kidney stones.. large ones.. being the male equivalent.

  • M73p Tiny - Powers Off Trying To Use Rear USB Port??

    Hi all,
    I have an M73p Tiny.  On the back are 3 USB ports, one of which is near the top of the machine right above the LAN port and next to the wireless antenna.
    On this particular PC (I have 160 of them total), if I even TRY to plug something into it, the machine dies immediately.  Just powers off.  And the only way to turn it back on is to unplug the power cord, wait a few seconds, then plug it back in.
    I would also note that while most USB cables slide into a port fairly easily, this doesn't.
    Any ideas or should I just call tech support?  These are all under warranty.
    Thanks!
    Chris
    PS.  Normally I wouldn't care about one bad port, but on this particular PC I need all the USB ports I can get...

    Something is probably shorting out the port. You say the plugs do not insert easily, could you use that port for a plug you do not change out? Does the machine boot with something plugged into that port??
    I would call tech support.

  • USB 3.0 Port powered even when laptop off.

    I have a HP Envy 15 with USB 3.0.
    When my laptop is off the USB ports still provide power.
    I use a USB powered laptop cooler which continues to run its fans even after the Laptop is shutdown/powered off.
    I also have a USB external Keyboard and Mouse.  It, the USB connecting device displays its LEDs even after the Laptop it is connected to is powered off.
    My previous laptop didn't do this.
    Is there some way to fix this?
    Thanks.

    I bought the HP 17 1011NR Model on July 11 2010.Attached is the e-mail I send to HP customer service representative .The Answer i was given is that this issue is the design of all HP ENVY laptop and they will forward this issues to the their supervisor who will in turn send it to HP technical team to see if this can be fixed by a patch .I am guessing it can be handled with the patch in BIOS hope they will follow up on it.
     Scrap from E-mail send to HP customer service:
    After shutting down the Laptop all the 4 USB ports are powered, meaning they behave like a powered USB port. This is causing issue as I use all of my USB ports, to which I have connected Docking Station, TV Tuner, Laptop Cooling Pad etc. They are not shutting down as the USB is still powered after shut down. This is wearing down the Docking Station, Laptop Cooling Pad, TV tuner as they keep running until I remove them from the USB ports or remove the power adapter. This is becoming an irritation as every night I have go thru this exercise of unplugging the gadgets connected to USB port. I am using this as a desktop replacement and I have not seen a behavior like this in other HP laptops that I have.
    Please fix this or let me know how to power down the USB port after Shutdown (Like BIOS setting or WINDOWS7 Settings) or update your tech specs in HP Website to details that all the 4 USB ports are powered ports.  

  • Possible USB port damage using non-powered USB hub?

    Referring to the recent discussion on ruining firewire ports with damaged peripherals, a related question concerning the possibility of damage to the USB port:
    http://discussions.apple.com/thread.jspa?messageID=7948387#7948387
    I have an old iPod Shuffle, USB only, and a camera card reader, both of which which get pulled and connected "on the fly" to a bus powered USB hub which is attached to one of the USB ports on the iMac. Am I risking similar damage to the iMac USB port, itself, if something goes bad on the Shuffle or the card reader? Should I be using a POWERED USB hub to avoid direct damage to the iMac USB hub? (And, assuming it will have to be USB 2.0, will it be backwards compatible to USB 1.1?)

    No, my belief is that FireWire devices are more prone to damaging the circuitry behind the port due to connecting and disconnecting on-the-fly (compared to USB). There is supporting documentation on the web, for example.
    http://www.wiebetech.com/whitepapers/FireWirePortFailures.php
    http://lowendmac.com/misc/03/0421.html
    (there are many more)
    Mechanical failure (wear and tear) through constant plugging and unplugging is a secondary consideration.
    If your FireWire device is constantly connected, this issue does not exist (and there is no wear and tear either). On my Intel iMac, my external FireWire drive is always connected, and I use the direct port on the Mac. If I ever need to disconnect it, I shut down my iMac and then disconnect. The other FireWire port is connect to a hub, and that is where I connect and disconnect FireWire devices on-the-fly (old iPod, small bus-powered drive, and video camera).
    If your iPod shuffle is the old +thumb drive+ style with the USB plug, you should be using a self-powered hub. That may be why it is not reliable. Also, that plug on the old shuffle is the most likely part to fail, so it is possible that it is getting worn out. I bought a bunch of used and reportedly broken iPod shuffle (the older white type) on eBay to see if I could fix any of them. I would say, 80% of the time, it was broken due to a faulty USB plug (no data connection). On the rare ones broken for another reason, I used that good USB plug to get another shuffle working. (A few worked after using the iPod Reset Utility, without any other repair. )
    But I'm getting off topic with the shuffle talk...

  • Netbook NB305 - Are the USB ports fully powered?

    I'm wondering if the USB ports on the NB305 supply enough power to power an external 2.5" hard drive.
    Thanks very much!

    It can depend on the external drive.  A friend of mine and I bought our WDC Passports at the same time from the same store and mine works just fine on every laptop we have tried it on and his exact same model (the serial numbers are only about 100 apart) has troubles powering up on some of the same laptops mine runs fine on.  If it doesn't you can normally use a dual usb cable like this one to draw power from two ports to get it going. 
    http://www.xpcgear.com/usbtype2atob.html
    If you don't post your COMPLETE model number it's very difficult to assist you. Please try to post in complete sentences with punctuation, capitals, and correct spelling. Toshiba does NOT provide any direct support in these forums. All support is User to User in their spare time.

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