cannot use a flash disk while touchscreen usb is connected!!!...help

**nohope** · 06-22-2009, 04:13 PM

hi all
i need help in this
i haved a d945gsejt mobo
2gb ram
cid700m in dash 7"lcd vga touchscreen usb
i installed the drivers the touchscreen works fine but when i try to connect a usb-flash disk or a usb-dvd the computer says it is an unrecognized device while if i disconnect the touchscreen usb , the windows reads it normally
cant get y?
any ideas??
help please

**Curiosity** · 06-22-2009, 05:27 PM

Not enough power. Are you connecting these to an unpowered hub?

**nohope** · 06-23-2009, 12:52 AM

no it's connected directly to the motherboard

**Crinos** · 06-23-2009, 02:39 AM

Basically the same then... Some MOBOs use "unpowered hub" principe on the USB "hubs" connected. Strange, since it's easy to give the 5V needed...

If you try with a powered USB hub, your problems should go away

**nohope** · 06-23-2009, 02:46 AM

Originally Posted by Crinos

Basically the same then... Some MOBOs use "unpowered hub" principe on the USB "hubs" connected. Strange, since it's easy to give the 5V needed...

If you try with a powered USB hub, your problems should go away

i will try & reply on this thread
thanks

**Curiosity** · 06-23-2009, 10:48 PM

Motherboards should be able to produce 500mA continuous to all ports at the same time. But don't rule out other possibilities. You're describing problems with high power devices, but they are also USB 2.0 bulk transfer and the touchscreen is probably 1.1 so that's another factor. You could also be taxing the PSU. An external hub is still a good place to start though.