BIOS Updates forum

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

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

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.

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 ...