ktl532, Thanks
Any tests to further pinpoint the fault/
Peter
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Question
USB device not recognised message.
Questions on this topic have been asked before, but here is my situation and question.
I have XP professional and motherboard ASRock AliveNF4G-DVI. There are 4 usb connectors: two on the motherboard and two via a motherboard header to a panel on the front.
The machine in question runs my wife's dedicated educational software, is not connected to the internet and does not receive any attention or development for months on end, hence I cannot be precise as to when the fault occurred. The USB system had been working on system powered devices and self powered devices.
I received the message 'USB device not recognised' after previously the USB system was working OK.
Following the advice about software issues I persued the diagnostic advice in this forum to try and fix the issue. No solution was forthcoming.
Recently this machine has become redundant and I have revisited the problem.
I gave the machine a thorough clean, reinstalled XP and immediately tried the USB system, the fault was stilll there.
I then installed a 4+1 USB port to PCI converter and lo and behold devices are recognised as they should be. The four ports directly on the motherboard are still faulty
Have I a motherboard fault, am I wise to continue to use this machine which seems to work correctly in all other respects? Is software still a suspect?
In anticipation of your input,
Many thanks,,
Peter
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Answers
I'd keep using it but I'd make sure that all software and data was fully backed up. You've got an alternative solution to the faulty part so make use of the computer as it is.
What could be faulty?
Sigh, motherboard component but which one isn't worth pursuing. Could be capacitor, could be USB chipset, could be wiring. Not worth the effort in pursuing. Fixing would probably involve a new motherboard and the expense probably isn't worth it.
You could check the BIOS and reset everything to default in the hope that that does something.
to be sure if it is hardware or not, i suggest running from a live knoppix cd - it supports usb, so you can test it with another OS : ftp://ftp.uni-kl.de/pub/li
This will show you if you have a hardware problem or not.
if not, a complete install of XP will cure the problem for sure !
Nobus ,
sorry I have done a complete install
Quote
I gave the machine a thorough clean, reinstalled XP and immediately tried the USB system, the fault was stilll there.
dbrunton
I enabled legacy, but it did not fix the issue.
I've asked ASRock if they can contribute anything too, but no response so far.
Peter
nobus
I have not installed any drivers,
Here's what I see in device manager under 'USB'
5 off Host controllers
5 off Hubs
2 off 'mass storage devices' (kingston data travellers) This is true only when using the PCI / USB ports
If I move a traveller to one of the faulty inputs the system sees a device and says 'unknown device' in the list.
All devices are enabled and labelled 'device working properly'
Incidently I loaded Knoppix and it booted up and recognised the data traveller in the PCI card, but during configuration the display went to sleep and would not wake up! I'll persue this later if required.
Peter
what do you mean with off hubs, or controllers ?
>> but during configuration the display went to sleep and would not wake up! << this point s to a hardware error, as i suggested ! --> bad mobo probably
check also for bad caps as per www.badcaps.net
Nobus
5 off = 5 in number (two countries separated by a common language!)
Bear in mind that this system has been working 100%, without usb active for two years. Whatever the fault is , it does not seem to interfere with other functions.
The action of putting the card into a socket is recognised (by hardware and software?) and put into the device manager list, but the device can't identify itself, and therfore no driver is loaded when this occurs, there must be a clue here.
For the Kinsgston travellers one W2000 and one other XP machine both find the drivers from within their own resources, I've never had to load drivers.
I'll take a look at badcaps in the morning.
Thanks for your help,
Peter
I've experienced this exact same problem on several machines. Unfortunately it is a hardware failure, but the good news is that it is seldom the usb controller itself. I've found the problem to be that the usb bus can no longer supply enough power through it so devices either won't work, or won't initialize properly due to the inadequate power. if you're still hot on resolving this, try picking up a powered usb hub try running some devices off of it while plugged into one of the faulty ports. Just make sure the hub has it's on external power source, that's the key.
you can also check for leaking or bulging caps, as per www.badcaps.net
socalsuperhero,
Yes I wish I had thought of this, I have always had a sneaking feeling that it may be power related. So I tried it with expectation, but alas no change still the 'no recognize' message. But well worth a try and thanks for your suggestion.
Nobus
The mobo is 2 years old, but I did have a good look round when I had it on the bench a few days ago, nothing forthcoming. The article was well worth reading.
My cheap external 7 port hub failed on this machine yesterday. 4 of the ports failed, 3 remain operational.
So I paid more $'s for a Belkin 7 port, in the hope that the bit in the spec about protected power supplies really is so.
It leads to a general question, are these hubs proven to be vulnerable to problems, maybe power related? What do those with more experiance than I say?
Peter
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by: ktl532Posted on 2008-08-14 at 02:19:05ID: 22228717
After read through your post, I do suspect is a hardware failure.