New Build: Keyboard & Mouse Problem

[blind486]

mobo: MSI K8N NEO4-F
cpu: AMD Athlon 64 3000
keyboard/mouse: Logitech Internet Desktop Pro Black (PS/2)
power supply: 450 watts (pre-installed in casing)

Im building a new computer and assembling all the new stuffs that i brought. Everything works fine, except the keyboard and mouse issue. Here's the problem

After a couple of secs or minutes, depending how long the system have been shutdown. The keyboard and mouse freezes. Even in BIOS i notice the keyboard will freeze in secs. or minutes. And sometimes it can't even detect the keyboard at all at start-up.

My conclusions is that its kinda grounded, i disassembled everything and layed out the motherboard on a cardboard attached all the wires and everything that is needed... System went fine, i even waited like 30mins run 3dmark and problem never occured again. But at a time i put all things back together inside the casing, the same problem occured again.

Keyboard and Mouse are really unstable, Luckily i made it to installing Windows XP SP2 and all the drivers needed in my build. It still works using USB keyboard/mouse, i already tried attaching other mouse/keyboard to the PS/2 ports, the same problem occured still. Im already annoyed shutting down the system again and again to activate the mouse/keyboard for just a short time.

-Can it be grounded to the casing?
-At first i thought problem is the motherboard itself,
but how come it work fine when i layed it all without the case?
-Can the front panel I/O connectors be responsible?
-Is the plate that comes with the motherboard to be attached
in the casing can be grounded?
-How do u know if its grounded or not?

Hope you can help me guys.

[Cricket]

Make sure that all standoffs installed on the motherboard mounting tray corresponds to a mounting hole in the motherboard...if there are any stray ones, remove it.

Does the PS/2 ports lined up correctly with the holes in the I/O plate? What about the little tab that touches the PS/2 block...is positioned correctly over the PS/2 block?

Cricket

[blind486]

the standoffs are properly aligned on the holes, I/O plates are installed correctly. i just bend the metal so the PS/2 ports can fit thru its hole/opening, the bended metal somehow touches the PS/2 port a bit. One thing also, i noticed the piece of metal on the videocard the one you'll screw on the casing... it somehow touches the side of the motherboard or the casing, would that somehow get shorted too? i should have brought a larger casing ill try again to disassemble everything when i have a time when i get home, im still busy at work. ill keep you guys updated.

[jessil]

I have the same prob. Except, my kb doesnt work at all. i turn comp on and the lights on kb flash then nothing. and i did the same thing where i took my mobo out to see if it was grounded somewhere but, did nothing for me. have tried 3 dif keyboards and nothing. any suggestions would be awesome.

[freakitchen]

Jessil - please start your own thread for your own problem. You'll get more, and better responses that way.

Freakitchen

[blind486]

Okay i've done the pc surgery again, remove all the things inside the casing and layed it all on the cardboard, this time it gotten worst. keyboard and mouse won't detect at all. so i decided to blame the motherboard and went to the computer shop where i brought it. i got the motherboard with memory & processor attached, videocard, and the harddisk.... only to find out that everything was working well, including the PS/2 port! now what did i missed? now i'm blaming the power supply, cause its the only thing that were left and untested. as i'm typing this post now, im using my Logitec Internet Pro Desktop Black, Keyboard & Mouse PS/2 in the office with no problems at all!

There's nothing left to be blame but the power supply...Is it possible for it to cause such erratic/unstable PS/2 port connection? I also notice it once while im testing, after the keyboard and mouse hanged up, i heard a tiny clicking inside the PSU then the entire system shut down itself, but i didn't mind that. This is a generic 450 watts that is included in the casing that i brought. So what do you think guys?

[Panama Red]

I think you're on the right track with the psu. Generic psu's that come with the case are often cheap ones. The only case/psu combos I trust are Antec and Enlight.

[USMDude]

I agree with Panama. Most people at some point, including myself, think that the only important thing about a PSU is the wattage, which is what lesser PSU-makers will try to fool you on. But the most important thing is the current per voltage(which you can find out by looking at the sticker on the side), plus the weight(a heavier PSU usually has more capacitors, which means it's of better quality). I once worked with a guy's PSU that was rated at 350W, and weighed only a pound, while a PSU from a good Dell system we have was rated at like 325W but was 3 pounds. Needless to say, his PSU was crap.

[Cricket]

Originally Posted by Panama Red The only case/psu combos I trust are Antec and Enlight.

To add to this list of case/PSU combos...AOpen (with AOpen power supplies), Enermax (with Enermax power supplies, not the PowerUp junk) and InWin (with the PowerMan power supplies).

Cricket

[glc]

AOpen is a great deal - their power supplies are made by FSP.

[blind486]

thanks for all the tips on the psu. and thanks for all the help in this topic. very much appreciated.