Usb port rejects midi Keyboard saying too much power being used?

Hello,
any one had an issue with their USB plug in device saying that it was drawing too much power so have disabled the device? I bought my son a keyboard for Christmas. However just today it's stopped letting him use the keyboard due to the USB connection failure. Any clues?

This is a common problem with USB ports. The only permanent solution is to create your own powered set of USB ports. You do that with a powered USB hub, any powered USB hub will do. You plug the hub into a wall outlet for power, and to the Mac for connectivity. All your USB devices can then be plugged into the hub without drawing any extra power from the Mac. Cameras, printers, scanners, keyboards, what ever are all plugged into the hub. You can have as many ports as you want!
Examples of USB hubs.
http://usb-hub-review.toptenreviews.com/

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Apple USB keyboard drawing too much power

I had my apple slim keyboard for more than a year and it always worked perfectly.
Last week I started receiving this error message at the login screen:
"Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled."
Changing the USB port used to solve the problem. Since this Sunday I can't get the keyboard to work on any USB port.
No other devices are using the keyboard as an HUB and the iMac has all the latest updates installed.
I tried on a Macbook and got the same result, while if connected to an HP laptop it works.
I already tried:
- changing USB ports on the rear of the iMac
- attaching it on an externally powered USB HUB
- resetting PRAM
- resetting SMC
- cleaning the contacts of the USB cable and the ports on the keyboardù
- attaching usb devices to the ports on the keyboard will give them power, but those are not recognized by the system
Any clues? I ran out of ideas...
thanks

It's related to the current drawn through the USB port itself which us monitored by the SMC and interpreted by the OS. Without getting too technical, Macs are better "tuned" to detect these issues. It sounds like your keyboard is dead or dying as it is drawing more than it's allocated current threshold. Solution, replace the keyboard. Some possible causes over time include, sweaty hands, humidity, coffee - it's the sugar over time that does the damage.

Dual-USB External DVD/CD RW 'drawing too much power'

Hello,
I had to make an emergency purchase down my local electrical store because my internal drive has stopped working properly. So, bought one of these: (http://cnmlifestyle.com/) DVD/RW that is supposed to be mac compatible. It has two USB connections - one for power & another for data I presume.
When I plug it into a USB port, a dialogue box appears saying 'Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled.' And so therefore there isn't any power to the unit... and it won't work.
This appears immediately after plugging one of the two in. When I plug in the second USB connection a second, identical dialogue box appears. If I connect then re-start, two of the dialogue boxes appear...
Might it be that this unit is not compatible with laptops? (there is no information about voltage on the unit).
Many thanks,
Jay

Optical drives have motors and that makes them power hogs. If it does not get power from its own power brick, it could be overpowering your USB bus, especially if you have other USB devices connected.
Have you tried swapping the cables on the Mac's ports? Some people report that the left- and right-hand ports produce difference power levels.
If the drive does not have a separate power source, it was designed for mobile use on a notebook computer but someone in Marketing was not thinking about power issues when trying to jump on the mobile bandwagon.
I see two solutions, the best listed first:
1) return the drive for one that has a power brick self-powered)
2) Purchase a powered USB hub (has a separate power brick). That way, the drive gets a lot of power from the hub. This one:
http://eshop.macsales.com/item/Macally/TRIHUB4/
shows an ac adaptor is included

Too much ink being used

We have gone through an XL ink cartridge in 4 week and they are suppose to last much longer. We do not print things very often, what problems could be happening to use all this ink so quickly. Any answers are greatly appreciated!!

Please read this post then provide some details. What printer model? What operating system? What are you printing?
There are a few general things to reduce ink usage:
Do not turn the printer off from an external switch, such as a power strip or outlet switch. Even if the printer is properly shut down first from its own switch an external switch will cause more ink to be used at startup. The printer should always be connected to a live outlet.
Do not run unnecessary cleaning cycles. Cleaning cycles use ink and are rarely needed.
Printing in Draft mode uses about half the ink of Nomal or Best modes. For everyday printing, especially text, draft mode may give acceptable results.
Photo prints (on photo paper) use much more ink than normal plain paper printing.
Bob Headrick, HP Expert
I am not an employee of HP, I am a volunteer posting here on my own time.
If your problem is solved please click the "Accept as Solution" button ------------V
If my answer was helpful please click the "Thumbs Up" to say "Thank You"--V

HT4101 What does it mean when it says that the USB device requires too much power?

What does it mean when it says that the USB device requires too much power, when using the ipad lightening pin camera connection kit?

Just that. The iPad allocates a certain amount of power to that port. If the device you're trying to plug in wants more than the iPad is willing to give, it'll trigger that warning.
If it's something that you just must hook up you can try using a powered USB hub, but results are mixed at best.
What are you trying to hook to your iPad?

IPad mini retina - The connected device requires too much power.

Hi,
I just bought the IDJ Live 2 Controller on 6 march 2014.
when I connect the lightning cable to the ipad and idj live 2, it shows me an error.
Unable to use the device: The connected device requires too much power.
i use the original cable from numark idj, my configuration is:
ipad mini retina ios 7.0.6 - idj live 2.
I tried with iPhone 4, it works well. (same ios)
I also have a sd card lighting adapter and it works on the iPad mini retina.
Currently it is not possible to power the lightining cable..
maybe in future, will Apple increase the output current through new ios?

No, because the other end of the lighining cable has a mini usb (type b) connector.

HT4106 How do I use a midi keyboard on GarageBand with my iPad? When I try it says the device cannot be used as it requires too much power. However, I have given the midi it's own power source.

How do I use a midi keyboard as an input device on garageband? Its an oxygen 61 board. I'm using an iPad camera connection kit and a separate power source for the midi but each time it says it cannot use the midi as it requires too much power.

I have the same problem with my iPad and 61. Sometimes it says device not supported and sometimes it rants about power - any solutions anyone ?

A barcode scanner that was connected directly to the Mac's USB port stopped working as the "USB had too much power drawn", even though it has worked for over a year in that port. WHen we plugged it into the port on the keyboard, the device works. Why?

A barcode scanner that was connected directly to the Mac's USB port stopped working as the "USB had too much power drawn", even though it has worked for over a year in that port. When we plugged it into the port on the keyboard, the device works. Why? Obviously the device is operational. Could the USB port have burned out from having too much power drawn? If so, is it reparable?

It can't draw "too much" power, it can only draw as much as the USB port is able to provide and no more. IIRC, the keyboard port has a lower power output than the iMac's port.
That being said, yea, it's possible that the port has failed and it can be replaced or if another port works you can use that one. Although if it is still under warranty or covered by Apple Care, then I would take it to an Apple Store or service provider to get the port repaired.

MacBook pro 13" mid 2010 "USB drawing too much power" HELP

Hi, my MacBook Pro keeps coming up with a window about 30 after start up saying "USB drawing too much power" and none if the USB ports work neither does the iSight camera (green light is constantly on) and the headphone jack won't work! I have tried re installing OSX but it hasn't worked! Apart from an SMC reset and a PRAM what else can I try? Absolutely nothing is plugged in not a single cable or keyboard or mouse just my MacBook on its own, is it definitely a software problem or am I going to have to get apple to repair the hardware because I do not have that much money to replace a logic board and get apple to replace it themselves. Thanks in advance!

I hope it works for you ...

USB port drawing too much power. The device that is plugged into it will be

I get this strange message every so often, sometimes more often than other times. It says:
USB port drawing too much power. The device that is plugged into it will be deactivated.
There are only two things plugged into the USB-The keyboard and mouse. When I get this message, the mouse freezes. If I jiggle the mouse cable where it is plugged into the USB, it comes back and everything is fine until this message comes up again.
Ever seen this before? What did you do?
Thanks for your help.

Ahh I guess I could have figured that out by reading your hardware tag huh...
So it's giving you the message when booting up from a cold system with NO devices attached? (Not even the keyboard and mouse?).
How long before you get this message?
After you get this message, if you plug the mouse in to either USB port (As each port is a seperate bus), to clear the alert, and go into About this Mac, and More info, if you expand the USB info for each bus. Is there anything there that appears to be out the ordinary? (IE Only showing one bus, Showing a device plugged into a bus that isn't plugged in?)

My USB ports Using too much power with nothing plugged in.

So i have this macbook pro mid 2009 model. Whenever i boot the computer up, there's this message that comes up. USB ports must be shut off because its using too much power blah blah blah. Theres nothing plugged into them!
Everything works, camera and all that, but the USB ports.
Do i need to download anything to get them to working?
Is it with the logic board?
or idk what to do!
Please help!

Have you tried an SMC reset and PRAM reset?
SMC Reset
Shut down the computer.
Unplug the computer’s power cord and disconnect peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
Reset PRAM
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P and R.
You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
If that doesn't help, perhaps re-installing the 10.7.2 update using the combo (unless you already tried this):
OS X Lion Update 10.7.2 Client Combo
repairing disk permissions before and after updating.

I plugged in my ipod and now i get the error message: Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled" - i have a MAcBook pro and now my USB ports do not work - can anyone help me ???

i plugged in my ipod and now i get the error message: Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled" - i have a MAcBook pro and now my USB ports do not work - can anyone help me ???

Sometimes you have to reset the SMC two or three times for it to work, don't know why. I've seen that error message before and 100% of the time it was fixed with an SMC reset. I suppose it's possible that your keyboard or mouse IS drawing too much power, do you have access to another you could try?

New MacBook, New ipod, "Usb port drawing too much power" message?

I just got a new MacBook and ipod Nano, and when I plugged the ipod into the usb 2.0 port, a message came up saying a usb port was drawing too much power and would be shut down. i'm charged and plugged in, is the wire messed up, the port, or the nano?
-E

strange - try the second port.
possibly a bad cable.

USB ports automatically shutting down for drawing too much power

Hi there, i currently use both of my USB ports on my MacBookPro for memory sticks and a basic mouse (nothing fancy or high powered).
Even if these are not plugged in i receive an error message saying that my USB hubs are using too much power and have to be shut down. Im currently required to back my work up every hour so the loss of the hubs is very annoying.
When working, the memory sticks are often randomly disconnected and crash the programme im working on.
Any ideas and or similar experiences??

It sounds like you have a program accessing data directly from a memory stick. A much better procedure is to copy the data to the hard disk and then let the program work on it there. If you have a program crash the original data is still safe on the memory stick. When you have finished working with the data on the hard disk, only then copy the data back to the memory stick.

When I plug in my iPhone to my iMac my computer flashes a box that says my USB device is drawing too much power from my computer and claims one or more of my devices have been disabled. Then it will not sync my iPhone. Any solution ideas?

When I plug in my iPhone to my iMac my computer flashes a box that says my USB device is drawing too much power from my computer and claims one or more of my devices have been disabled. Then it will not sync my iPhone 5. Any solution ideas?

Try unplugging any other USB devices. If you are using a hub, don't, connect the phone directly to a computer USB port.
None of these are necessarily things you should do, but might help. For instance, if you plug the phone to an already busy hub, the phone might be "the straw that broke the camel's back" and lock out the hub.

Usb port rejects midi Keyboard saying too much power being used?

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