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zero key on num pad won't work in dos

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4 replies

by digital gypsy

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when using a dos program, the zero key does not work on the num pad. It works in any other program in windows. I have to use the zero key above the alpha keys. I have changed keyboards to test but with same results. I have noticed that occasionallythe zero key may work just once in a session on the num pad but is a rare occasion. I am no expert, but no how to prod around with properties & settings but can't find any resolution. Can anyone give a suggestion ?

4 replies

by dklippert

Is your machine turning NumLock off in DOS? Check your CMOS?BIOS setting when the machine boots up to see if there is an entry to have NumLock on at start up

by digital gypsy

sorry, but all the other numbers work. It is just the zero key that doesn't work. And on a rare occasion it might get a zero to come up, but very rare.

by thechas

Does the zero key function when you boot from a boot disk?

If not, it is a problem with the BIOS or motherboard.

If it works from a boot disk, or in BIOS setting mode, then I suspect that your DOS mode keyboard file is corrupt. I think the file is kybd.sys
Try replacing this file.

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