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External harddrive causes reboot when connected

I

Infra

Member
Hello. I have a toshiba 80 GB 2.5' harddrive, installed in a case to be used as an external USB harddrive. It works flawlessly on many computers, but on one computer it causes a problem: The PC reboots when I connect it to the usb port. I'm guessing it's because of power issues (300 watt PS) as the PC has 2 harddrives, 2 optical drives, and a P4 2.8 GHz. Using WinXP SP2 with all updates on winupdate. Any ideas would be appreciated.. Thanks!
 
It is almost certainly a power issue of some sort. I see two basic possibilities: either the PSU is on the edge to begin with, and that pushes it over or the USB connection is shorting and causing the PSU to freak out.

Diagnostic questions: Does this happen on any USB port in the system, or only some of them? Is the system otherwise unstable, resets when spinning up optical media sometimes, etc.?
 
Thanks for your replies, guys.

Phisrow: The same happens on all usb ports on the system. In normal conditions, everything works smoothly with no problems.

I'm not sure its a 300 watt ps. Probably it's along the lines of 200-250 watts. I'm considering getting a 350+ watt ps and seeing if it solves the problem.

Will keep you posted!
 
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