I had my system running just fine and went to plug in a USB external HD and seemed to short the system, thought my power supply dead, replaced and still the same problem, got any ideas what this could be? Now i'm thinking the motherboard took a hit and i need to replace, but don't want to buy if it's not the problem. I don't know what else it could be.
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Four possibilities come to mind. 1. Your power supply is bad and the battery ran down. 2. Your system board died. 3. You have a bad device plugged into a USB port. 4. Your battery is bad and holding down the AC power. To troubleshoot, disconnect all external devices, even remove the CD drive if possible. Try to boot. Next, boot with just the battery. Next, boot with just the AC supply. That's about it. If you still have no power at boot, it is the system board.
For that make sure usb cable works fine. Try with different usb cable. Also connect usb cable in different usb ports of computer. Right click on my computer then click on proeperty then hardware->device manager. Then click on sign of usb controllers then uniunstall all usb drivers 1 by 1. then restart computer. Then check. If still not recognized then when you power up the computer press F8 key then enter in safe mode. then check. in normal mode again.sometimes harddisk need to start in safe mode . Let me know if you need more assistance. thanks.
OK, i experience this before, i think your situation is mostly like mine, and this problem may cause by the your laptop power adapter, please replace a new adapter and see how is the result. Hope this help.
go into your 'update settings'. there is a section of where it asks you about how you want your settings set and where to send updates to. You may find the problem here. Check all the 'advanced' settings as well. If your Western digital is plugged in via USB and not requiring updates, unplug it while starting your system, after complete start up, reinsert the USB plug. It may show new devise found, then from here, you may be asked to reinstall it to stop the rebooting.
The first thing you should do is remove the video card and try to boot
the PC using the onboard video (video on the Motherboard) and see if
that solves the problem. If it does, try putting the video card back
in in a DIFFERENT PCI slot and try it again. Sometimes Windows loses
its marbles about
cards inserted into PCI slots. My nieces eMachine loses its marbles
over the Wireless LAN card about once a year, so I just move it to a
different slot (swap it with the phone modem card). If that makes it
flaky again, try updating the video card drivers. If it doesn't help,
your video card is shot.
If it isn't the video card, try taking out one memory chip at a time and booting with the
first one in. If that doesn't do it, swap the memory chip with the
other one and try booting it again. If needed, replace bad chips....
After that, it is probably the power supply or the MB itself. Swap out
the power supply first. If it is not the power supply, then it is
probably the MB, and you are SOL.
I would attempt to connect the drive after the system has booted up. If the external drive is found and accessible copy the data to another drive. If the external refuses to be recognized, allow the drive to cool completely 2-3 hrs, place the unit in a freezer for 2-3 hrs and then try the procedure again. Often times when the drive units or platters within the HD begin to fail you get symptoms as you have described. Super cooling the drive sometimes allows you to remove the data. If not and the data contained within the drive is valuable to you there are software solutions as well as companies that specialize in the data recovery field.
well with some usb hubs in the computer its self are provided enough power to handle a certain amount of data if you can get a hub with its own power supply or a appliance with a power supply minimizing the amount of power the main usb is having to supply this problem should be sorted
Aside from what you're trying you can also use ubcdwin4 to create a boot cd which may give you access to the data on your friend's hard drive (with network support for copying the data to another PC), it might be worth a look.
As far as your WD is concerned, if you have the ability to remove the drive from it's external case and plug it into the system via the IDE plug you may have better luck. You may also want to try changing the bios in order to boot from USB device and plug the WD into one of the USB ports.