Would I break something if...

[Howard]

..I butchered a USB cable and re-routed the 5v power to a USB device (Matrix Orbital LCD) from the USB port, to a 5v output from a molex connector for example? Would that play havoc with the USB device being detected, or make something go bang in a plume of smoke?

The reason I want to do this is that my mobo always provides power to USB when the PC is off and there's no way to disable this as far as I can see, so I'm trying to think of possible solutions

[dave87]

If you get the right wire, I can't see a problem with it.

But I thought the USB connection was also the way the device communicated to the PC?

[Pob255]

You know you could always try the swtich on the wall socket once you've shut down your pc

[dave87]

....and then his BIOS battery would be dead in months not years....

[tinners]

..I butchered a USB cable and re-routed the 5v power to a USB device (Matrix Orbital LCD) from the USB port, to a 5v output from a molex connector for example? Would that play havoc with the USB device being detected, or make something go bang in a plume of smoke?

The reason I want to do this is that my mobo always provides power to USB when the PC is off and there's no way to disable this as far as I can see, so I'm trying to think of possible solutions

Can you turn off wake from keyboard/mouse or usb in the BIOS ? This might be what keeps them on.

[Howard]

But I thought the USB connection was also the way the device communicated to the PC?

Yeah I was talking about taking the two power wires only though (or even only one, the +5v wire), and leaving the other two data wires connected to the USB socket.


And yes I could turn it off at the back of the PSU, but that's not suitable for the lazyman such as myself

Can you turn off wake from keyboard/mouse or usb in the BIOS ? This might be what keeps them on.

nope.

[tinners]

irrelevant post deleted

[Howard]

Sorry it's not my NF7 It's the Gigabyte board in my HTPC

[dave87]

Tinners, perhaps you could leave the info in there, as other people may have similar issues, and that might be helpful in the future...

[tinners]

Tinners, perhaps you could leave the info in there, as other people may have similar issues, and that might be helpful in the future...

i thought that just as i deleted it. Basically on the NF7 you need to change some jumpers on the mobo which turns the USB ports from powered / wake uppable to not powered.

[jimbouk]

Yeah most motherboards have jumpers for power on USB, but they're not always mentioned in the manual.

Or you could always just buy a couple of spare battering for a few pounds. The Small Battery Company are quick and cheap.