Dell Monitor USB ports don't recognize some devices

[Guest Lee M.]

I have a Dell LCD monitor with 4 auxiliary USB ports. I have my keyboard

and a Sandisk card reader attached and both work fine as does my Garmin GPS

when I need to upload a new map. When I plug in a Sandisk MP3 player or my

Kodak digital photo frame, neither one shows up in Explorer. Both are

recognized by my Vista laptop. The mobo USB ports recognize everything

that is plugged into them. Does this sound like an XP problem (I am

running XP Home SP2) or a hardware issue?

 

Thanks.

[Guest Shenan Stanley]

Re: Dell Monitor USB ports don't recognize some devices

 

Lee M. wrote:

> I have a Dell LCD monitor with 4 auxiliary USB ports. I have my

> keyboard and a Sandisk card reader attached and both work fine as

> does my Garmin GPS when I need to upload a new map. When I plug in

> a Sandisk MP3 player or my Kodak digital photo frame, neither one

> shows up in Explorer. Both are recognized by my Vista laptop. The mobo

> USB ports recognize everything that is plugged into them. Does this sound

> like an XP problem (I am running XP Home SP2) or a

> hardware issue?

 

If the devices *are* recognized in the USB ports that are on the

motherboard... just not when plugged into the monitor ones - I think the

answer is obvious.

 

(Hardware)

 

However - it would not be the first time I have seen it where people get som

many USB devices they atart using a 'hub' device and that hub device cannot

handle everything connected to it because of power reasons.

 

--

Shenan Stanley

MS-MVP

--

How To Ask Questions The Smart Way

http://www.catb.org/~esr/faqs/smart-questions.html

[Guest smlunatick]

Re: Dell Monitor USB ports don't recognize some devices

 

On Jun 1, 10:37 am, "Lee M." <lmacmil@forget_it.com> wrote:

> I have a Dell LCD monitor with 4 auxiliary USB ports.  I have my keyboard

> and a Sandisk card reader attached and both work fine as does my Garmin GPS

> when I need to upload a new map.  When I plug in a Sandisk MP3 player or my

> Kodak digital photo frame, neither one shows up in Explorer.  Both are

> recognized by my Vista laptop.   The mobo USB ports recognize everything

> that is plugged into them.   Does this sound like an XP problem (I am

> running XP Home SP2) or a hardware issue?

>

> Thanks.

 

You must note that every USB ports are part of a USB Hub. USB hub

have a power limit and you need to check to see if you pass this

assigned limit.

[Guest Lee M.]

Re: Dell Monitor USB ports don't recognize some devices

 

 

"Shenan Stanley" <newshelper@gmail.com> wrote in message

news:ugux5j$wIHA.3780@TK2MSFTNGP03.phx.gbl...

> Lee M. wrote:

>> I have a Dell LCD monitor with 4 auxiliary USB ports. I have my

>> keyboard and a Sandisk card reader attached and both work fine as

>> does my Garmin GPS when I need to upload a new map. When I plug in

>> a Sandisk MP3 player or my Kodak digital photo frame, neither one

>> shows up in Explorer. Both are recognized by my Vista laptop. The mobo

>> USB ports recognize everything that is plugged into them. Does this sound

>> like an XP problem (I am running XP Home SP2) or a

>> hardware issue?

>

> If the devices *are* recognized in the USB ports that are on the

> motherboard... just not when plugged into the monitor ones - I think the

> answer is obvious.

>

> (Hardware)

>

> However - it would not be the first time I have seen it where people get

> som many USB devices they atart using a 'hub' device and that hub device

> cannot handle everything connected to it because of power reasons.

>

> --

> Shenan Stanley

> MS-MVP

> --

 

Is it possible to determine the max power a hub device can provide? Or to

rank USB devices in order of power consumption? That way I could put the

heavier users directly into the mobo ports and use the hub ports for the low

power devices.

[Guest Patrick Keenan]

Re: Dell Monitor USB ports don't recognize some devices

 

"Lee M." <lmacmil@forget_it.com> wrote in message

news:opGdnWlWULzKW9_VnZ2dnUVZ_sDinZ2d@comcast.com...

>

> "Shenan Stanley" <newshelper@gmail.com> wrote in message

> news:ugux5j$wIHA.3780@TK2MSFTNGP03.phx.gbl...

>> Lee M. wrote:

>>> I have a Dell LCD monitor with 4 auxiliary USB ports. I have my

>>> keyboard and a Sandisk card reader attached and both work fine as

>>> does my Garmin GPS when I need to upload a new map. When I plug in

>>> a Sandisk MP3 player or my Kodak digital photo frame, neither one

>>> shows up in Explorer. Both are recognized by my Vista laptop. The mobo

>>> USB ports recognize everything that is plugged into them. Does this

>>> sound like an XP problem (I am running XP Home SP2) or a

>>> hardware issue?

>>

>> If the devices *are* recognized in the USB ports that are on the

>> motherboard... just not when plugged into the monitor ones - I think the

>> answer is obvious.

>>

>> (Hardware)

>>

>> However - it would not be the first time I have seen it where people get

>> som many USB devices they atart using a 'hub' device and that hub device

>> cannot handle everything connected to it because of power reasons.

>>

>> --

>> Shenan Stanley

>> MS-MVP

>> --

>

> Is it possible to determine the max power a hub device can provide? Or to

> rank USB devices in order of power consumption?

 

Yes, by examining the specs for the devices. But if the ports are damaged

in any way, the specs don't mean much.

 

USB ports provide a maximum of around 500mA. If the hub is passive, that

is split between all of the ports, including the one the hub is plugged in

to.

 

Powered hubs can provide more power, but not more than the power source can

provide.

 

HTH

-pk

> That way I could put the heavier users directly into the mobo ports and

> use the hub ports for the low power devices.

[Guest Guest]

Re: Dell Monitor USB ports don't recognize some devices

 

Hi there,

check you 4 auxillary ports there may be one different, as on a printer

scanner etc,

if so you have to take a feed from USB connector off the computer. Its known

as a throughput device.

 

deejaydee

 

 

"Lee M." <lmacmil@forget_it.com> wrote in message

news:7_6dna0RDPCVKd_VnZ2dnUVZ_j-dnZ2d@comcast.com...

>I have a Dell LCD monitor with 4 auxiliary USB ports. I have my keyboard

>and a Sandisk card reader attached and both work fine as does my Garmin GPS

>when I need to upload a new map. When I plug in a Sandisk MP3 player or my

>Kodak digital photo frame, neither one shows up in Explorer. Both are

>recognized by my Vista laptop. The mobo USB ports recognize everything

>that is plugged into them. Does this sound like an XP problem (I am

>running XP Home SP2) or a hardware issue?

>

> Thanks.

>

>

>