My macbook air stops powering up following plugging an external usb dvd device. Looks like an internal fuse might have been blown. This happened on a Macbook pro but next day it recovered.
Does macbook air have similar chance to recover or is it an extensive damage?
MacBook Air, OS X Yosemite (10.10.1)
In my view if any external device is plugged into any USB port on the Mac it is important that the device operating voltage in NOT more than the standard +5volt as specified by the USB pin specifications. Anything of higher voltage is very likely to blow the internal fuse and the machine will fail to power up permanently. I never had to replace one, but believe it is a full dismantling job with soldering and replacement of specialised power supply fuse - if that is in the design.
Failing this it may be a very expensive motherboard replacement job!!
Any other thoughts?
In my view if any external device is plugged into any USB port on the Mac it is important that the device operating voltage in NOT more than the standard +5volt as specified by the USB pin specifications. Anything of higher voltage is very likely to blow the internal fuse and the machine will fail to power up permanently. I never had to replace one, but believe it is a full dismantling job with soldering and replacement of specialised power supply fuse - if that is in the design.
Failing this it may be a very expensive motherboard replacement job!!
Any other thoughts?
All USB compliant devices supply 0.5a (continuous) at 5vdc with a maximum of 1.1a (peak) available. Otherwise they would not be USB compliant devices. You have a defective external device, and now that it has caused issues (some great some small) with 2 different Macs I advise you not to connect it to any more.
Take the Air to an Apple Store
macbook air does not power after plugging external drive into usb socket,any answer
