External USB wont show up on desktop

[draptak]

Have a 2.5" External HDD which doesnt appear on my desktop PC anymore, its not listed in device manager & computer management, etc. 'Device not reconziged' doesnt pop up. I've tried all USB ports. Already uninstalled and updated the USB ports. Still nothing. There is a blue light on the external HDD when connected to the usb port though

Although it perfectly works on my laptop

I have tested my PC with a 16GB flash drive, it works perfectly, but the external drive doesn't.
I'm guessing my USB port has insufficent power?

 

[PSCO2007]

When I had that problem (switching an external hdd between pc and laptop), I went into Device Mgmt and scrolled down - mine showed, but did not appear in My Computer - so no way to access it.

I right clicked and assigned a drive letter.

I would think yours would show up at bottom, especially since it works in another computer.

 

[draptak]

When I had that problem (switching an external hdd between pc and laptop), I went into Device Mgmt and scrolled down - mine showed, but did not appear in My Computer - so no way to access it.

I right clicked and assigned a drive letter.

I would think yours would show up at bottom, especially since it works in another computer.

Thanks PSCO2007, Lucky that worked for you, but there's nothing appearing on my Disk management except my C: HDD.

Funny thing I turned off my PC with the External HDD still plugged in, when the PC shutdown, the External HDD started to power up 100%. It's strange, turned my PC back on, it powered down, but with the blue lights still on.

 

[Berton]

Sometimes Windows will turn off the USB ports to save power, maybe that is kicking in too soon.