Thank you for a quick reply.
Drives are empty, and hard disc is first boot dvd and floppy are disabled. I have tried with one then both drives disconnected, IDE disconnected cable, and no searching but the pc still took the same amount of time to post. Searching every 5 secounds x 8 searches approx 40-45 secounds. Only advantage with both drives uncoupled is the lack of noise at search, but of course no drives, no cd or dvd play. Asus cannot throw any light on my prob and say " In this situation, please consider to contact your retailer for a check. If it is due to motherboard faulty, he will send it to us through distributor for RMA. We will solve your problem as soon as possible", so they think it could be the motherboard??? Everything else works fine. I have also updated the firmware in both drives and then uninstalled it again and gone back to original settings. Still the same. Looks like I will have to spend some money.