Question My father computer get stuck in the POST, when an external USB HDD is connected to it

aor999

Commendable
Jun 28, 2017
45
0
1,540
2
Hello:
When I turning on my father computer, while my external WD My Passport HDD connected to a USB port at the MB, the computer get stuck in the POST, even before the memory read:


My father computer specification
PSU: Enermax NAXN 450W
MB: Gigabyte GA-H55M-D2H rev 1.4
BIOS: Award Modular F4 02/06/12
Memory: DIMM3: Kingston 99U5471-001.A00LF 2GB
CPU: DualCore Intel Core i3-540, 3066 MHz

Why this problem happens?
 

aor999

Commendable
Jun 28, 2017
45
0
1,540
2
Update: I just entered the BIOS, and the USB-HDD isn't listed at all. Also: Once I connecting the external HDD, while I'm in the BIOS, the computer hangs up.
 

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