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What would be causing this keyboard error

I have a Dell Dimension 2400 that when it boots up I get a Keyboard Error.  I'm told to press f1 to continue or f2 for the setup.  Nothing works though.  The specific error is 8602 - Auxiliary Device Failure.  I have tried other keyboards.  I have tried a USB keyboard and when its plugged in it bypasses the keyboard error and works fine in Windows but it will not work at the BIOS level.  Finally the 4 lights that are on the motherboard plate at the back where everything connects a, b and c are green and d is orange.  Thanks in advance for any help that can be given.
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GTKINC
Asked:
GTKINC
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3 Solutions
 
David523Commented:
I've checked the Service Manual for the Diagnostic Light Sequence described with the following:

Dicagnostice Lights:

A, B and C = GREEN
D = ORAGNGE (YELLOW / AMBER)

Service Manual States:

Problem Description:

Another failure has occurred.

Sugjested Resolution:


Ensure that the cables are properly connected to the system board from the hard drive, CD drive, and DVD drive.
If the problem persists, see "Contacting Dell" in your Owner's Manual.


No other information is available But I believe I've seen this same Diagnoostic Light Sequence before on a different model Dell with the resolution being to Replace the Motherboard.

Please Post the results of Reseating the Cables.

Hope this Helps!!!
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garycaseCommented:
Well, this is tricky.

It sounds like your PS/2 controller may have gone.   When you say you've tried other keyboards, I presume they were also PS/2 keyboards -- correct?

A USB keyboard will work fine in the BIOS and at the DOS level IF "USB Legacy Support" is enabled in the BIOS.   Unfortunately, since you can't get to the BIOS, you can't set this !!   Are you SURE you can't enter the BIOS with the USB keyboard?   (Try using different USB ports)

Just in case you've recently reconnected things --- are you SURE you have the keyboard and mouse plugged into the correct PS/2 ports?  (they're physically the same and it's easy to connect incorrectly)

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GTKINCAuthor Commented:
David, reseated all and still the same.

Gary, I'm almost offended.  But yes, they are plugged into the correct spots.  

I've replace a few of these MOBOS before and this model for lack of a better term sux.  Looks like I may have to replace another.
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maramomCommented:
It sounds like your PS2 port may be faulty. The problem would be to enable  USB keyboard to work in bios setup. The default settings for USB devices and emulation are 'on', so resetting CMOS will likely allow the USB keyboard to work. The CMOS jumper is next to the battery. Moving it to 'reset' then normal (while powered off, unplugged) will clear CMOS. This may even solve the ps2 problem if the CMOS was corrupted.
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garycaseCommented:
"... Gary, I'm almost offended " ==> please don't be !!  I almost didn't make that comment; but it's easy to do -- I've done it myself when just reaching behind a PC to plug the keyboard/mouse in.   I was pretty sure that wasn't the case -- but you'd hate to spend time on this and find out it was something that simple.
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GTKINCAuthor Commented:
I'm being sarcastic.  Trust me I know.  You have to make sure the person knows to make sure the power is on in the house when they complain about not being able to see their "windows screen"
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GTKINCAuthor Commented:
maramom, i'll try that and repost.
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garycaseCommented:
... by the way, try booting with the USB keyboard connected and NO mouse connected.
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garycaseCommented:
maramom -- you beat me to the punch => I just thought of that as I posted my last note :-)

I think there's an excellent chance that will do the trick -- as I noted earlier, the trick here is to get USB legacy support enabled; and I agree it's almost certainly the default setting for the BIOS.
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maramomCommented:
I checked the readily available manual, and it is!  :)
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garycaseCommented:
... Yes, I just confirmed that  (one good thing about Dells is that their documentation is all easily available online).
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David523Commented:
Dell User Manual, Service Manual:

http://support.dell.com/support/edocs/systems/dim8400/en/index.htm

Hope this Helps!!!
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GTKINCAuthor Commented:
Spot on Gary!  I plugged just the keyboard in and it booted right up.  If there were any errors then I couldn't see them.  I placed a USB mouse on the machine and everything seems to be perfect.

This being said what would you say the prognosis for the machine is?  More specifically should I just run it until it quits?  Thanks for your time and prompt answers.
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GTKINCAuthor Commented:
Well.  It looks like I jumped the gun.  It worked until I rebooted it.  Now I'm back to square one again.  
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maramomCommented:
Did you clear CMOS?
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garycaseCommented:
Try booting again with JUST the keyboard and no mouse.   See if you can get into BIOS setup.  If so, be sure to set USB emulation ON.   If you can't do that, then do a CMOS reset -- either by using the jumper (as described by maramom) or by simply removing the CMOS battery for 30 seconds (with, of course, the system unplugged).

As for the "prognosis" -- it sounds like your PS/2 ports have failed.   If the system will work okay with a USB keyboard & mouse, the system should be fine.   If not, then there may be a more fundamental issue.   If you're willing to spend a few $$ ($10 - $15) we can try to resurrect it.   Otherwise, it may very well need a new motherboard.
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GTKINCAuthor Commented:
I have cleared the CMOS.  I can't get the machine to work with the USB keyboard.  It stops at the hit F1 or F2 screen and the keys of a PS2 or USB keyboard don't work.

Also even with no keyboard or mouse hooked up it still gives me a keyboard failure.  Its looking like a mobo.
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David523Commented:
With all that has been done, the Diagnostic Lights and the issue still exist - though sometimes intermittent, the Motherboard would seem to be the solution.  Following are some sources for a Motherboard but further searching internet might be adviseable:

1.  You can call Dell for a parts price quote at:  (800) 822-8965

2.  http://www.nobleowl.com/products.asp?product_id=6864838046

3.  http://www.ascendtech.us/itemdesc.asp?ic=MB4DELG1548FOPW&eq=&Tp=

As always when considering parts replacement I suggest that consideration be made towards the purchase of New Equipement.  Overall cost and equipment quality may be cheaper with New Equipment than repair action.  Dell is having some good sales as follows:

 http://www1.us.dell.com/content/topics/segtopic.aspx/odg_special49?c=us&cs=19&l=en&s=dhs

Hope this Helps!!!
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garycaseCommented:
Well ... one good thing about the 2400 ==> unlike many Dells, it uses a standard ATX power supply.  So you can replace the motherboard with any ATX unit without having to also replace the power supply.   I would NOT buy another 2400 motherboard -- you may as well get a board with an AGP slot if you're going to replace it.


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GTKINCAuthor Commented:
I agree with the fact that this motherboard is crap.  I have replaced about 10 of them so far with this particular model.  But the issue with putting another board (non Dell) is that the original xp disk won't work.
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garycaseCommented:
Here's a nice little board for $50 with onboard sound and video and an AGP slot so you have the option of better/faster video:  http://www.directron.com/ga8s661fxmprz.html

The downside of using a non-Dell motherboard is that when you call M'Soft to re-activate XP they MAY give you a hassle (since it's a Dell OEM XP with a non-Dell motherboard).  From what I've read, they'll do it (just point out that all you did was replaced the motherboard), but it is a risk.
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GTKINCAuthor Commented:
My experience has been no.  But I do agree that another board would be a better solution.  Thanks for all the help.
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garycaseCommented:
... obviously you are already aware of the XP activation issue :-)     I do know a person with a Gateway who had a similar issue -- replaced the motherboard with a non-Gateway board -- and Microsoft DID give him an activation key;  and I've read of the same for Dells => but it IS a potential issue; and Microsoft could refuse to allow activation.    Worst case is an extra $90: http://www.newegg.com/Product/Product.asp?Item=N82E16837102059
(but I think they'd probably activate the system for you)


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