keyboard error or no keyboard present

BIOS Questions that don't belong in the other forums. Read them!
Post Reply
Asaf Ersoy
New visitors - please read the rules.
Posts: 4
Joined: Sun Sep 19, 2004 2:57 pm

I open my Pentium MMX 200 unit, Win 95, and fitted an PCI modem. When I switch on I get the following BIOS message: "keybord error or no keyboard present". I tried three different keyboard, both the original DIN socket and the new PS/2 socket with no success. I understand fault could be at 8042. What is 8042 and can it be repaired or is it a chip.

My BIOS is Award Modular BIOS V4.51PG and
my chipset is SiS 5511/12/13.

Big question is can anything be done or shall I throw the matherboard away?
Rainbow
The UniFlasher
Posts: 3122
Joined: Wed Mar 20, 2002 4:16 pm
Location: Slovakia
Contact:

Do the keyboard LEDs flash when powering on? If not, there might be a blown fuse on the motherboard - usually near the keyboard connector, marked as F1 or FS1.
Patched and tested BIOSes are at http://wims.rainbow-software.org
UniFlash - Flash anything anywhere
Asaf Ersoy
New visitors - please read the rules.
Posts: 4
Joined: Sun Sep 19, 2004 2:57 pm

No. LEDs do not flash when powering on. F1 seems to be ok, as there is continuity without disconnecting it and same voltage across both ends. But thank you for your observation. I shall look for a connection problem.
Rainbow
The UniFlasher
Posts: 3122
Joined: Wed Mar 20, 2002 4:16 pm
Location: Slovakia
Contact:

Check if there's 5V on pin 5 of the keyboard connector http://www.hardwarebook.net/connector/u ... rdpc5.html.
Patched and tested BIOSes are at http://wims.rainbow-software.org
UniFlash - Flash anything anywhere
Asaf Ersoy
New visitors - please read the rules.
Posts: 4
Joined: Sun Sep 19, 2004 2:57 pm

Looking from the front of the DIN socket with the keyboard removed, going clockwise, I get the following voltage readings:

Pin 1. 4.1 V
Pin 2. 0 V
Pin 3. 4.1 V
Pin 4. 5.2 V
Pin 5. 0 V

Regards
Asaf Ersoy
New visitors - please read the rules.
Posts: 4
Joined: Sun Sep 19, 2004 2:57 pm

PS/2 MiniDin6 pin numbers as follows:

Pin 1. 4.2 V
Pin 2. 0 V
Pin 3. 0 V
Pin 4. 5.8 V
Pin 5. 4.2 V
Pin 6. 0 V
Ritchie
BIOS Guru
Posts: 761
Joined: Wed Oct 30, 2002 5:17 am

Your mainboard most likely has a PCI rev 2.1. Check that the PCI modem does not require PCI rev 2.2 or higher.

I'd think either that or a faulty mainboard.
Tatar
New visitors - please read the rules.
Posts: 4
Joined: Mon Sep 27, 2004 1:36 pm

Thanks. I shall try to find out.
Post Reply