acer travelmate 4150 can`t read from the usb floppy~ Help~

Don't ask how to hack password. (BIOS Passwords)
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walxdwa
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Joined: Mon Dec 29, 2008 7:27 am

I recently updated my bios in XP , but then it went blank in its rebooting. Then i checked the solutions on the internet and find that there is one--The "Fn + Esc" one.
i absolutely follow the steps like unpluging the battery ,unpluging the ac/dc cable and pluging the ac/dc cable after holding keys [Fn]+[Esc] , alos, i unplug the HDD. But it still can`t boot from the usb floppy.
Also, during these process, i found some strange things:

1.when i held keys [Fn]+[Esc] and pluged the ac/dc , the motherboard came up with a very low beeps, long , clear and didn`t stop until i press the power button .

2.The usb floopy indicate light never lit up. But the cd-rom seem to work.

3.After i press the power button , whatever i still press the "Fn+Esc"Combo, the CPU FAN won`t stop until i press the power button for 5 seconds.Then the laptop restart instead of turning down which is what it is suppose to do.

In the end, i don`t kown whether there is a bios jumper on the motherboard .i need help and thanks in advance.
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