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Power failure after plugging in USB cable. No power

Have a LG300 laptop which was working fine until I plugged in a usb cable, when the laptop lost power, and will no longer power up. Any suggestions?

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  • 12 Answers

You likely shorted your motherboard/ southbridge. A competent repair shop (one that can diagnose to board level)may be able to repair the short if it is not too bad otherwise you will likely need to replace the motherboard.

Posted on May 21, 2009

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Posted on Jan 02, 2017

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Check the USB connection
The icon on the USB cable (c01424575.gif ) faces up when the cable connects to the product correctly. Check the back of your product and the back of your computer to make sure the USB cable connects correctly and securely.
After you make sure the USB cable connects correctly and securely, review the following guidelines to check other potential USB-related problems:

  • USB ports on the keyboard. USB ports on the keyboard and in the front of some computers might not be powerful enough to support the product. If the USB cable connects to the USB port on the keyboard, try connecting it to another available USB port on the computer.
  • USB cable length. HP supports USB cables less than 5 m (16 feet, 5 inches) long. However, a USB cable that is 5 m (16 feet 5 inches) long must be of high quality. Otherwise, HP recommends using a USB cable that is less than 2 m (3 feet, 3 inches). Do not use patch cables to increase the length of an existing cable. Use a powered USB hub if you need more length.
  • Alternate USB ports. Connect the USB cable to another port on the computer to make sure that the USB port on the computer is not the cause of the problem.
  • Defective USB cable. Replace the USB cable to make sure that the existing cable is not defective.
  • Conflicting USB ports. Disconnect any other USB printers, USB scanners, USB cameras, and any other USB connected peripherals. Start reconnecting these devices one at a time to determine if one of the devices is using too much power. Consider purchasing and installing a powered USB hub if necessary. NOTE: A USB-powered hub is a device that increases the number of available USB ports on a computer and facilitates communication between the USB devices and the computer. A powered USB hub can resolve communication failures between some, but not all, USB chipsets and HP products.

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You can also try a different USB cable and a different USB port on your laptop

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There is a power consumption work-around untill a Y usb wire can be purchased; the main power cable must still be used at all times but this workaround should only remain temporary!!!
Simpletech should have included this so laptop users could use the drive as their capacity is better than the packaged slimmer simpletech portable backup drives for laptops, which does include the Y cable....
1) unplug usb while powered and unknown hardware is present on laptop...
2) turn power switch off from the external HDD...
3) return power switch to on from the external HDD...
4) plug in usb connection to laptop...
Autoplay should read from external HDD!!!
**** Save some $$$ and buy a Y shaped cable to provide sufficient amount of power from laptop usb
ports, cause it's necessary to use 2 of your ports to provide power in addition to the main power from HDD to wall****

ADONIS

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2 Answers

FreeAgent Go


The beeping means that not enough power is being supplied to the device, and as a result, the disc will not spin up (not recognized). I suspect that the reason he was able to once make it work is perhaps he has more USB devices plugged in now...therefore, not enough power to go around. Or perhaps he has swapped cables?? I had this exact same issue when I bought a new cable for my Freeagent Go. I wanted a longer cable, but for whatever reason the cable itself didn't supply enough power; I got that ugly sounding beep (could have been a bad cable I suppose). When I plugged the drive in using my old cable, it worked flawlessly. I would first ask him if he has been plugging in more devices recently. Then I'd get a compatible USB cable that has an extra power connection (when he plugs it in, he'll have to plug into 2 USB ports).

Hope this helps.

-Paul

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Is the drive running when connecto to power ans PC?
Try it on another PC.
Check the power supply if it is operated from an external power supply.
It it is self powered via the USB then this is a possible problem- the PC power supply cannot cope - Removing other USB devices may help here

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