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Problem with Inspiron 8500. When docked it doesn't recognize the cdrom & the device mgr has errors for Secondary IDE Channel & Communications port. (error for Secondary IDE Channel is "IRQ Request 15 used by communication port (Com1)). When undocked the device mgr is clean & cdrom is recognized. Happens with multiple docking stations. I had this problem once before & even replacing motherboard didn't fix - had to reformat & reload. Any ideas?