Having problems with your HP Compaq d530 CMT PC Desktop ?

My USB ports no longer detect devices when plugged in.

\015 I have an HP Compaq d530 computer and it has 6 USB ports. They all used to work fine but now they aren't reading any devices when I plug them in. I really want to use my Ipod on my computer but cant because it isnt read. I have my mouse pad plugged in to a USB port and all it does is it lights up the outside of the mouse pad and it is working fine but whenever I plug in my ipod or anything else, it doesnt read them. I was wondering if anyone could help me out. Thanks\015

Answers :

Updating, or in some cases reinstalling, the drivers for your computer's USB interface should resolve this issue.
\015\012Locate the iPod in Device Manager\015\012
    \015\012
  1. Connect iPod to the computer. \015\012
  2. Quit iTunes if it launches. \015\012
  3. On the Start menu, click Control Panel. \015\012
  4. In Control Panel, open Administrative Tools. Note: If you don't see Administrative Tools, look at the left column in Control Panel for a link that says, "Switch to Classic View," and click it. \015\012
  5. Double click the Computer Management shortcut. \015\012
  6. In the left column, click on Device Manager. \015\012
  7. In the right column, click the plus (+) icon next to Universal Serial Bus controllers to expand this selection.
  8. \015\012
  9. Locate the iPod in this list. In some cases one of the entries will have "iPod" in its name. If no such entries are present, the iPod is most likely represented by "USB Mass Storage Device."
  10. \015\012
  11. Note: A red "X" appearing next to the iPod's entry in Device Manager indicates this device is disabled. To enable this device, right-click its entry in Device Manager and choose Enable from the shortcut menu.
  12. \015\012
  13. \015\012Update the USB driver
    \015\012
      \015\012
    1. Right-click the iPod's entry in Device Manager and choose Update Driver from the shortcut menu. \015\012
    2. In the Hardware Update Wizard that appears, select "Yes, this time only" to allow Windows to connect to the Windows Update Website. Click Next.
    3. \015\012
    4. Select "Install the software automatically (Recommended)" and click Next. Windows searches for updated drivers and installs any it finds. If Windows is unable to find updated drivers on its own, continue with step #4. \015\012
    5. Click Back. \015\012
    6. Select "Install from a list or specific location (Advanced)" and click Next. \015\012
    7. Select "Search for the best driver in these locations." \015\012
    8. Select "Include this location in the search" and type the following in the field below: C:\\Windows\\INF
  14. \015\012
  15. Click Next. Windows searches this location for drivers and installs any it finds. If Windows is unable to find updated drivers on its own, you must reinstall the USB drivers as shown below.
  16. \015\012
  17. \015\012Note: During installation, if a message appears stating that the software you are installing "has not passed Windows Logo testing" click Continue Anyway to continue installing the drivers.
  18. \015\012
  19. \015\012Reinstall USB driver
    \015\012
      \015\012
    1. Right-click the iPod's entry in Device Manager and choose Uninstall from the shortcut menu.
    2. \015\012
    3. In the resulting dialog box, click OK. \015\012
    4. In the Device Manager window, right-click Universal Serial Bus controllers and choose Scan for hardware changes from the shortcut menu.
    5. \015\012
    6. \015\012Windows automatically reinstalls the necessary USB drivers and attempt to remount the iPod. Regards...
I have had my two front USB ports go faulty.  I know exactly what caused it as I was playing with some hardware that I was developing.\012
The power is fed to the two front USB ports via a Micrel power feeding IC.
This IC can control the amount of current to the PORT/S and is programmed via a resistor which limits the current to about 3 AMPS
Now I would have thought that 500 mA.USB port would have been more sensible but not in HP wisdom.
What is worse, they two power feeds do not have individual feeding.

Anyway, in my d530, the Micrel chip was faulty.  Rather then replacing it(which would mean sourcing another one), I simply desoldered the IC and soldered a short wire link across  pads 5,6,7& 8 which connects +5 volt back to the USB port.
The two front USB ports work nicely again.
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