USB ports not working (Solved, but...)

Status
This thread has been Locked and is not open to further replies. Please start a New Thread if you're having a similar issue. View our Welcome Guide to learn how to use this site.

NicklasPS

Thread Starter
Joined
Aug 15, 2011
Messages
5
Hi guys,

A conundrum for you. I've worked on a Sony Vaio VPCF1 where both USB 2.0 ports did not receive power. Neither was damaged.

- Windows 7 (x64) did not in any way acknowledge a connection, not even in failsafe mode, with any device of any type.
- Device manager and DxDiag did not see any problems with the USB, and listed both ports normally.
- I tried uninstalling and completely removing all USB instances in device manager, and reinstalling them. No luck.
- I checked the registry for invalid USB entries, and found none.
- I updated BIOS and chipset drivers.
- I checked powersettings for the USB, and made sure they weren't shut down in any way.

I then finally took it apart and reset the cables, even though everything seemed perfectly fine. I deliberately left it without any power for about 12 hours. After powerup the system clock had reset from power shortage, and both USB ports now worked perfectly.

So...what could do something like this, and why would draining the power solve it??

All the best,

Nick.
 

leroys1000

Banned
Joined
Aug 15, 2007
Messages
6,319
If the system clock reset,then the cmos battery on the motherboard
is dead or the cmos clear jumper was left in the clear position if you
have recently used it to clear the cmos and reset the bios.
A dead cmos battery can cause hardware detection problems.
 
Status
This thread has been Locked and is not open to further replies. Please start a New Thread if you're having a similar issue. View our Welcome Guide to learn how to use this site.

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

As Seen On
As Seen On...

Welcome to Tech Support Guy!

Are you looking for the solution to your computer problem? Join our site today to ask your question. This site is completely free -- paid for by advertisers and donations.

If you're not already familiar with forums, watch our Welcome Guide to get started.

Join over 807,865 other people just like you!

Latest posts

Staff online

Top