Used the wrong power cable for external hard drive, now it doesn’t turn on anymore

Troubleshooting External Hard Drive Power Issues Due to Incorrect Power Cable Usage

When managing external hard drives, ensuring the correct power supply is essential for device safety and data integrity. Recently, a user encountered an issue where their 6TB Seagate Expansion Desktop (model STKP6000400) failed to power on after inadvertently using an incompatible power cable. This situation underscores the importance of verifying power specifications and understanding potential risks involved.

Case Overview

The user’s external hard drive requires a specific power supply:

• Model: ADS-25D-12 12018E
• Input: 100-240V~50/60Hz, 0.7A
• Output: 12V, 1.5A, 18W

In error, the user connected it to a different charger with the following specifications:

• Model: BS-24W1202000LS
• Input: 100-240V~50/60Hz, 0.7A
• Output: Marked as “12V 2000mA,” with online descriptions indicating “12V 2A 24W.”

The key difference is the current rating: the original external hard drive’s power supply provides 1.5A, while the incorrect charger supplies only 2A (2000mA), which is higher — generally acceptable if the device only draws what it needs. However, subtle differences and unverified compatibility can cause issues.

What Happened Next

Fortunately, no noticeable sparks, burning smell, or physical damage was observed, which suggests that the power supply did not cause immediate physical harm. After switching back to the correct power cable, the drive failed to turn on or produce any sounds, leading to concerns over potential internal damage and data loss.

Understanding Power Compatibility

• Voltage: The voltage ratings (12V) match, which is crucial.
• Current (Amperage): The power supply’s maximum current rating (2A) exceeds the drive’s requirement (1.5A). Devices typically draw only what they need; thus, supplying a higher current is generally safe.
• Power (Wattage): Calculated as voltage x current—here, 12V x 1.5A = 18W for the original; the incorrect power supply offers 12V x 2A = 24W, which is higher but typically not damaging if the voltage