My desktop computer always restarts when I connect any USB media – Pendrive,
External ROM and External Hard drive. Can you tell me the cause of my PC
restarting?
Nope.
I’m not trying to be annoying about it, it’s just that from the description
you’ve given it could be one of any of hundreds of different reasons.
The best I can offer is to walk through some of the most common causes to
help you further diagnose – and perhaps repair – the problem.
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I had a similar issue some time ago.
I tried to connect my new mobile phone using the software provided with it, and it somehow messed up the ‘plug-and-play’ component of windows, so that nothing using that technology worked.
After a couple of hours tearing my hair out, I used a System Restore point from before I installed the software, and everything worked again.
From then on, I just used my phone in ‘memory stick’ mode :/
I had a similar problem. But, not all USB items would crash the system. It turned out to be a dust-clogged heatsink. Apparently, the USB item put enough strain on the processor to heat it up to the point that the computer would freeze. After I cleaned the computer out, all USB items work fine.
This is a problem that exists with Windows Millenium that I have run into many times when upgrading from 98 to Me. Windows Me supports usb flash drives, but will get an exception in this instance. I have not found any solutions to the problem on the internet.
I have 4 ports – one regularly crashes my machine so its a hardware fault. Leo suggests USB hub but all do not seem to work well – problem with PC camera via hub for example. How does one choose a fully compatible hub?
You did not say what PC you had, configuration, power supply size, updated video cards, etc.
It may be that the power supply is too small for the current system, something especially true on Dells), and is running near max. If the USB port settings are set to shut down to save energy (device mgr>Unversal Serial Bus Controllers>USB Root Hub>properties>power mgt), the minor surge from them turning on when a device is plugged in could cause the issue.
@ChrisZ: If the PSU was really running that close to full capacity, surely the simple act of powering on the machine, thereby powering up everything, would cause it to shut down? Also, many Dells, especially the older ones, quoted the median instead of the maximum power available (or something like that) so they often look underpowered, whilst in reality being as powerful as a more highly rated unit.
Had the same problem very recently….definitely not a software issue.
In my case, I am almost certain the problem is being caused by corrosion (we live quite near the beach).
Corrosion or dust (or a combination of both) would be the most likely suspects (IMO).
You point about static was true for me in the winter when our house is dry. I got in the habit of touching the computer case with the USB device in hand before I plugged it in and never had a problem after that.
Regarding grounding one-self and the USB Device to the PC, remember to use a metallic part of the PC!!
Many years back, we had similar problems in degree, due in part to the nylon carpet tiling of the office; and particularly with one girl, who declared that she always wore nylon underclothing.
The cure for the carpeting was to dampen it frequently, as was also recommended by the manufacturer for the different reason that if it dried out, the nylon tufts would break readily.
Incidentally, touching a metallic part of a PC or any other electronic device, is much more satisfactory than using a grounding strap.
A maintenance contractor burned out three sets of memory chips for a DECServer, whilst using a grounding strap; until I prevailed upon him to try grasping the chassis, when the fourth set was successfully fitted.
And that was when memory modules cost a lot more than today.
A frequent mistake when using grounding straps is connecting them to a separate ground point. The MUST be connected to the actual unit, whether the unit itself is grounded or not.
The need is to be at the same potential as the unit.
AD
I had the same problem when I plugged in my camera to any of the USB ports. I happened to find the instruction sheet to my external card reader, and it said that it may draw a lot of power. I had recently added a 2nd HD and a replacement DVD burner. I had the shop check out my power supply — they ended up replacing it with a larger power supply. It’s been fine ever since. I had to suggest the power supply — they were talking about replacing the mother board.
Hi,
I had nearly the same problem at several computers. They tend to restart when I unplug external device and I found out that there was a software (Lock Folder XP)that causes this problem.
Speaking of USB, one rare problem I have found is that some machines will not even POST (Power On Self Test) when certain USB devices are attached. In some cases it is totally reproducible, in others it occurs sporadically. However, if your computer suddenly does not run POST when you turn it on, check to see if you have any USB devices attached and detach them if so.