I am begining to think its the mother board that is the problem
Its always a possibility its the motherboard board but its still more likely to be something else thats the problem.
You said you have just tried a different cable & drive which you know work, right? Using those new parts, can you work through the checklist below please:
1. Check the pins on the floppy drive port on the mobo & the ones on the drive to make sure none of them are bent
2. Following my previous instructions, double check the cable connections at both ends to ensure they are correctly inserted
3. If the floppy cable has a total of 3 plugs on (1 to mobo, 2 for drives) and a twist in it at one end (see pic below), the plug on the end of the cable where the twist is must be the one fitted to the drive. This is the one marked 3.5" Drive A connector in the picture (you probably won't have the 5.25" connectors on yours so ignore them)
[attachment=2993:attachment]
4. Make sure the power connector is correctly attached to the drive
5. Go into the bios & check the following settings - you may not have all of these settings in your bios or they may be worded differently. If you're unsure about any, just ask :
First floppy drive 'A' : 3.5" 1.44MB
Drive B : none
Floppy 3 support : disabled
Swap Floppy drive : disabled
Boot up floppy seek : enabled
Onboard FDC or FDD controller : enabled
Boot priority/order/sequence : make sure Floppy drive is in first position
Save the changes in the bios & reboot system
Let me know the outcome.