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Targus USB keypad fryed the mother board

by claysb / October 25, 2006 5:47 PM PDT

this happend at work, an XP operating system. Using a Targus Keypad USB 1.5Mbs. Occasionally the keys stop responding. One fix is it unplug the USB cord and then plug it back in. (front USB connector) We have done this several times but on this occasion the motherboard fried.

Additional data, key pad is in high use environment and it is common enough to work the keys faster than the product software which may or may not account for the occaisional key failing to respond. Also staples get under the keys. PAUK10 is the Targus retail number.

My questions are, can staples under the keys short out the key pad? or can USB devices cause spikes in systems? Keypad draws 5 volts. Can a non responding keypad cause the computer to not reconize the device and thus spike the power supply upon plugging it back into a running computer?

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If you look at the USB "spec" it allowed for...
by R. Proffitt Forum moderator / October 25, 2006 10:04 PM PDT

A short on the 5V USB bus. If the board fried then one could argue the board didn't meet the USB spec.

Either way both the board and keyboard are now suspect.

"can staples under the keys short out the key pad?"

Yes. I'd not issue a laptop to such an owner.


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by Willy / October 26, 2006 1:52 AM PDT

Even though a USB device can be unplugged and replugged, it does have the possibility of introducing, "static" and blow the USB port/hub. Further, constant plug/unpluging can allow the system to get confused if no "proper dismount" isn't done. To see if you can still use the system just return a plain old PS/2 kybd. back to that system. Under the bios, see if you can increase the "buffer" for the kybd. to allow a faster typist some room. Otherwise, just "wait" for the kybd. actions to catch-up, as you can see impatience has caused a problem. As for staples, heck they're "metal", metal in the wrong locations can cause problems sometimes fatal and permanent, but that's rare. Get a more spill-proof or "skinned" kybd..

tada -----Willy Happy

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