Dell Monitor USB ports don't recognize some devices

  • Thread starter Thread starter Lee M.
  • Start date Start date
L

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.
 
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
 
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.
 
"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.
 
"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.
 
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.
>
>
>
 
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