1394A external device can't be recognized

techo

hi All,

. N8 ?! C( l+ u4 k( p6 j3 ois there any one had experienced 1394A external device can't be recognized under OS?
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/ b3 @2 _4 C3 F8 _( ^+ ZI encounter this kind of issue recently.
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! Z$ B, i4 u+ f/ P: oOS is Vista & XP.

1394A controller is Ricoh.

the situation is I could see the removable icon shown on the system tray but there is no device in OS device manager.

& k4 }2 m6 T! a" F2 z3 Yindeed there are some differents but I don't know why.
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I wonder it's caused by BIOS but how to prove it?
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9 z; G9 Y5 V# r# S' p9 r! mis there any spec or document could let me refer to?
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Thanks anyway!