Fan has the cable cut off. Taken out from Dell Vostro 3550 Robin 60.4IE03.002
Dell Vostro 3550 Series 014KXD Fan & Heatsink -29A
Dell Vostro 3550 USB & Audio IO Board 48.4IF04.011 TESTED
Dell Vostro 3550 Laptop USB / DC Jack Board. P/N: 48.4IF05.021
Dell Vostro 3550 Express Card Reader Board & Cable 48.4IF03.011,50.4IF05.101
Dell Vostro 3550 08J85X Laptop Internal Speaker Replacement Unit
Dell Vostro 3550 Palmrest Middle Cover + Touchpad 06NWG1 6NWG1-1