Hi, Hmm. It won't let me reset the PRAM. Back to the chalkboard. In fact, nothing happens. Every time I reset the PRAM, I have always been holding them down before powering on, and it has always worked. I've tried it ten times now.
#Fail# I suppose that is out of the question right now doing that. Regards, Nic Mobile Me: nic2...@me.com Skype: Kvalme MSN Messenger: nico...@home3.gvdnet.dk AIM: cincinster yahoo Messenger: cin368 Facebook Profile My Twitter On May 7, 2010, at 9:23 AM, Nicolai Svendsen wrote: > Hi, > > Yeah, I'll definitely give that one I shot. I thought I recognized it from > something you had to do on occasion with ThinkPad. > > Again, thanks. I'll let you know. > > Regards, > Nic > Mobile Me: nic2...@me.com > Skype: Kvalme > MSN Messenger: nico...@home3.gvdnet.dk > AIM: cincinster > yahoo Messenger: cin368 > Facebook Profile > My Twitter > > On May 7, 2010, at 2:33 AM, Esther wrote: > >> Hi Nic, >> >> I've never used resetting the PRAM to fix a USB port issue before on a Mac >> -- only used it for audio sound repairs. However, the part about removing a >> battery and holding down the power button with the battery out (to discharge >> the capacitor) is something I've had to do before with an IBM ThinkPad >> laptop to reset electronic components. So that may work in your case, too. >> >> HTH >> >> Cheers, >> >> Esther >> >> Nicolai Svendsen wrote: >> >>> Hi Esther, >>> >>> Thank you. I'll try this. Resetting the PRAM has been tried before, but I'm >>> supposing holding down the power button when battery is removed is some >>> sort of cycle? I'll add it to resetting the PRAM again and let you know how >>> it works out. >>> >>> Regards, >>> Nic >>> Mobile Me: nic2...@me.com >>> Skype: Kvalme >>> MSN Messenger: nico...@home3.gvdnet.dk >>> AIM: cincinster >>> yahoo Messenger: cin368 >>> Facebook Profile >>> My Twitter >>> >>> On May 7, 2010, at 2:18 AM, Esther wrote: >>> >>>> Hi Nic, >>>> >>>> I'll cc this to the viphone list, since the last part of this post is >>>> about USB power usage and charging for the iPhone, iPod Touch and iPad. >>>> I'm not sure I qualify with respect to knowing a lot about hardware, USB >>>> devices, and electricity, but I'll try to answer your question, although >>>> I've never had OS X shut a device down with a message that it was drawing >>>> too much power. However, I did just make a recent trip where I had to >>>> troubleshoot one of the USB ports of a MacBook. Devices that were plugged >>>> into that port didn't work properly: printer cables wouldn't relay signals >>>> to the attached peripheral, iPods would not be recognized by iTunes, and >>>> a plugged in mouse was evidently powered (lit up), but not enough to >>>> register clicks on the machine. All these devices worked correctly when >>>> plugged into the other USB port. Power cycling with restart and repairing >>>> permissions didn't help. (I only tried the permissions repair because the >>>> Software Update had just been run to install a security update before the >>>> problem behavior.) What did work was resetting the PRAM, which apparently >>>> restored the USB port to its full power. If the source of your problem is >>>> not the aging of your headphones but the USB current support from your >>>> computer, this fix might help. I'll give you the instructions I received >>>> from Apple's Tech Support, since they're slightly different from what is >>>> in the Knowledge Base article. >>>> >>>> 1. Power down the computer and remove the battery from the MacBook. (On my >>>> model you need to get a thick coin, like a U.S. nickel, to insert in the >>>> slot of the lock for the battery, and give it a quarter turn clockwise to >>>> rotate it into the unlock position so the side of the battery near the >>>> lock will pop up, and so that the battery can be removed.) >>>> 2. With the battery removed, hold down the power button for at least 12 >>>> seconds. >>>> 3. Replace the battery. (On my model, you insert the side near the left >>>> edge of the laptop so that it engages, and then swing the other end so >>>> that it slots into the lock position. Then you use the coin to turn the >>>> slotted lock a quarter turn counter-clockwise to lock again.) >>>> 4. Hold down the Command, Option, P, and R keys while you power on your >>>> laptop. I press down the Command, Option, and R keys with my left hand >>>> (little finger on the Option key, ring finger on the Command key, and >>>> either middle or index finger on the R key). I press the thumb of my >>>> right hand on the P key and push down on the power button with the middle >>>> finger of my right hand. >>>> 5. You need to keep the Command, Option, P, and R keys pressed for at >>>> least 3 start-up chimes before releasing them in order to reset the PRAM. >>>> 6. Log in as usual and check your USB port connections. >>>> >>>> This fixed all the problems with the USB ports. I think, because the >>>> mouse was being powered, but not enough to register clicks with the >>>> system, that full power wasn't going to one of the USB ports. >>>> >>>> I'll point you to the Apple Knowledge Base article on "Apple Computers: >>>> Powering a peripheral through USB": >>>> http://support.apple.com/kb/HT4049 >>>> >>>> Computer USB 2 ports are supposed to be rated for 500 mAH. That's less >>>> than the 1000 mAH you'll get from an AC outlet (in the U.S.) with a USB >>>> charger for the iPhone or iPod Touch, which is why charging your device on >>>> the computer's USB port is slower, and which is also why the earlier iPods >>>> and iPhones could charge from FireWire connectors that didn't have the >>>> same limitation. Apple shifted the standard connector for its iPods and >>>> iPhones to USB2 because most Windows computers didn't have FireWire >>>> (a.k.a. IEEE 1394) ports. This is the source of some of the battery >>>> charging error messages that are seen with some iPhone cases -- all >>>> devices are now supposed to use chargers that adhere to the more limited >>>> current capacities for the USB2 standard. This is also the reason why >>>> some 3rd party batteries will take a long time to charge an iPhone if they >>>> only supply 500 mAH of current. I suspect that this is also why some >>>> cases, like the Mophie JuicePack Air, require you to discharge the >>>> secondary battery before draining the main iPhone battery for maximum >>>> charging use, since most batteries do not maintain power regulation as >>>> they discharge and may go out of the regulation specs. (This is of >>>> interest to me as an iPod Touch owner, since Mophie just came out with a >>>> JuicePack Air for the iPod Touch -- however, it appears to disable the >>>> internal speaker whether or not the earbuds are plugged in when the iPod >>>> is in the case, and also appears to disable use of the volume, start/stop, >>>> and voice control functions of the headset earbuds that com with the iPod >>>> Touch 3GS if they are used while the device is in the Mophie JuicePack Air >>>> case. This is based on user comments for this product at the Apple Online >>>> Store.) Incidentally, the 10 W Power Adapter for the iPad will charge >>>> iPods and iPhones, as well as the iPad (which draws 2100 mAH). However, >>>> the iPad will apparently not charge (even slowly) off the USB ports of >>>> non-Mac computers, and when connected to a Mac's USB port (not through a >>>> keyboard USB port, and not through a hub), may even give a message that >>>> the device is not charging (although, if you wait long enough, it will >>>> charge). >>>> >>>> From the same Apple Knowledge Base article that I linked above, here's the >>>> information about USB charging on newer Intel Macs: >>>> "On some newer Intel-based Macs, such as the MacBook (13-inch, Late 2007), >>>> when a device requiring more than 5V and 500mA is connected, the port with >>>> that device connected to it becomes a high-powered port capable of >>>> offering up to 1100 mA at 5 V. That port will continue to operate as a >>>> high-powered port until the device is removed. " >>>> >>>> That same Knowledge Base article (about USB charging) is referenced in a >>>> link in the Knowledge Base Article about "iPad: Charging the battery": >>>> http://support.apple.com/kb/HT4060 >>>> >>>> HTH >>>> >>>> Cheers, >>>> >>>> Esther >>>> >>>> Nicolai Svendsen wrote: >>>> >>>>> Hi guys, >>>>> >>>>> So, I'm looking for someone here who knows a lot about hardware, >>>>> specifically on the Mac-side and someone who knows a lot in particular >>>>> about USB-devices. Oh, and electricity, perhaps. >>>>> >>>>> Here's the deal. >>>>> >>>>> I've got a Skype Wireless Freetalk Headset, the old model. I've been >>>>> using it for a while with no issues at all. Eventually, my Mac would >>>>> disable the device because it said it was drawing too much power and had >>>>> to be disabled. >>>>> >>>>> The headset setup consist of a round-shaped small box with one button to >>>>> turn off the receiver completely, and to pair it properly to the receiver >>>>> and the headset. On this box there are two buttons, one extending to the >>>>> plug of a USB and the other extending to a small, round plug which plugs >>>>> into the right side of the headset for charging. Both of these >>>>> aforementioned wires both extend away from the round box. When I get the >>>>> message above in a dialog box, the headset promptly turns off because >>>>> there is no signal being received from the USB port as it becomes >>>>> disabled, and when touching the wire charging the headset, it becomes >>>>> boiling hot. The USB wire feels fine, but all the way from the point from >>>>> which the wire to the charger extends, to the plug that goes into the >>>>> headset for charging, becomes incredibly hot and almost impossible to >>>>> touch. >>>>> >>>>> My question to those knowing about this type of issue is this: Why would >>>>> this happen after a year or so of using this headset just fine? Is it >>>>> because the wire is broken? If that is the case, why could I use it for a >>>>> couple of hours prior to this happening today, regardless of twisted the >>>>> wire became? >>>>> >>>>> Thanks, and I'd be grateful for any advice. >>>>> >>>>> Regards, >>>>> Nic >>>>> Mobile Me: nic2...@me.com >>>>> Skype: Kvalme >>>>> MSN Messenger: nico...@home3.gvdnet.dk >>>>> AIM: cincinster >>>>> yahoo Messenger: cin368 >>>>> Facebook Profile >>>>> My Twitter >>>>> >>>> >>>> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "MacVisionaries" group. >> To post to this group, send email to macvisionar...@googlegroups.com. >> To unsubscribe from this group, send email to >> macvisionaries+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/macvisionaries?hl=en. > -- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To post to this group, send email to macvisionar...@googlegroups.com. 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