Buying an IPAD 2. Have Questions.

The failures I saw were due to the user pulling too much power from the USB ports. The particulars varied from case to case but it was always due to the user using USB ports to provide too much power to outside devices.

Will every machine experience a failure if you pull too much power off the USB ports? Probably not and I don't believe I insinuated any different. I simply said that I've seen many failures due to pulling too much power from USB ports and as such, it is something I recommend users avoid.

It was an innocent little piece of free advice. And since no good deed goes unpunished I'm being grilled and debated about what I've seen and what I know as a result. So you know what, forget I said anything. Run your freekin microwave off your USB ports for all I care. Jeez you try to be nice and people get their panties in a bunch about it.

Good luck with your ipad. Have a nice day. I'm out.

 

Well I am sure Asus knows what the USB chip can handle and have adapted their software program to supply enough mA to provide a higher output without damaging the end user's computer.

Without knowing how old the computers were or how many you fixed it is hard to say offhand that running a USB device caused the component failure.

You stated an open opinion, we did not see any justification to support your claims.

If you saw hundreds of failures on the same motherboard then it could be a chip issue. If you fixed one or two over the course of x years then it could simply be component failure.

USB 2.0 specs.

Battery Charging Specification 1.1: Released in March 2007 (Updated 15 Apr 2009).
Adds support for dedicated chargers (power supplies with USB connectors), host chargers (USB hosts that can act as chargers) and the No Dead Battery provision which allows devices to temporarily draw 100 mA current after they have been attached. If a USB device is connected to dedicated charger, maximum current drawn by the device may be as high as 1.8 A. (Note that this document is not distributed with USB 2.0 specification package only USB 3.0 and USB On-The-Go.)Micro-USB Cables and Connectors Specification 1.01: Released in April 2007.
Link Power Management Addendum ECN: Released in July 2007.
This adds a new power state between enabled and suspended states. Device in this state is not required to reduce its power consumption. However, switching between enabled and sleep states is much faster than switching between enabled and suspended states, which allows devices to sleep while idle.Battery Charging Specification 1.2[10]: Released in December 2010.
Several changes and increasing limits including allowing 1.5A on charging ports for unconfigured devices, allowing High Speed communication while having a current up to 1.5A and allowing a maximum current of 5A.

USB 3.0 specs

Battery Charging Specification 1.2[10]: Released in December 2010.
Several changes and increasing limits including allowing 1.5A on charging ports for unconfigured devices, allowing High Speed communication while having a current up to 1.5A and allowing a maximum current of 5A.

Mark

 

I send an inquiry into ASUS to tell us what the power output of the software package provides.

Mark

 

http://www.macworld.com/article/150356/2010/04/ipadcharging.html


Mark