Strange USB/Power issues

[MasterShredder]

I've been noticing a really odd problem recently and just figured out what the issue is, but need help finding a solution. I have a DFI Lanparty NF3 250gb motherboard with an Athlon 64 3000+ setup and everything's been running wonderfully. Yesterday, I went to plug in an external USB drive and my computer just shut off. I went to check the power strip, but everything else seems to be fine. Today, I went to plug in my iPod and it did it again. I rebooted and wanted to run a chkdsk to make sure I didnt have any bad sectors (which i do ) and noticed the computer gives me a POST beep, but just hangs right after.

I hit reset on my case and get the same result. If I unplug the ipod and reset, it comes up fine.

Recently, I put in a promise TX2 card and added 2, 200 gig HDD's in a RAID 1 because my server box took a dive. I have a ThermalTake 480 watt powersupply, so i'm guessing I should have enough juice. I have the following components in my computer:

primary sata HDD,
2, 200 gig ata100 drives
promise card
dvd burner
hauppauge pvr 150 capture card
radeon 9800

Does anyone have any ideas before I start ripping open my computer and messing around? This is quite annoying

 

[UltimaParadox]

Lets clarify if you hook up anything via USB, it basically locks and then does not POST with it still plugged in.

First things first, is to double check your USB connections to your motherboard, if you are using front panel USB connections, also check the cable.

Does the same thing happen if you plug it into the USB ports in the back of the computer?

Double check your BIOS setting, but typically nowadays you can only disable and enable the USB controllers, make sure the settings are correct.

 

[MasterShredder]

Lets clarify if you hook up anything via USB, it basically locks and then does not POST with it still plugged in.

First things first, is to double check your USB connections to your motherboard, if you are using front panel USB connections, also check the cable.

Does the same thing happen if you plug it into the USB ports in the back of the computer?

Double check your BIOS setting, but typically nowadays you can only disable and enable the USB controllers, make sure the settings are correct.

Okay i'll be a little bit more specific. If the computer is on, once in a while when I go to plug in a USB device (not EVERY time), the computer just shuts right off. BAM. No power. If I leave that USB device plugged in, (doesn't matter if its the front ports or the back ports), the computer gives me a POST beep and just freezes when trying to turn it back on. If I remove the usb device and hit the reset button, everything comes up fine. I just did a firmware update on my bios just to see if it was an issue, but it still does it.

 

[MasterShredder]

Well, today I got some free time and decided to unplug my RAID controller and both RAID drives. I tried all sorts of USB devices and it seems that the computer won't boot if the iPOD is plugged into it, but my removable hard drive and my flash cards/card readers will boot after post... hmm. So I put everything back in and i'm getting the same results. Maybe this is just an iPOD issue. But nonetheless, i'm scared to plug a usb device into this thing because I don't want it to shut off again and risk damaging other things. I'm not sure what the hell to do.