HDD/SATA Flex Cable DC020029U00 for HP ZBook 15/17 G3 G4

Your HP ZBook 15 or 17 (G3/G4) no longer detects the SATA drive or drops it intermittently? The DC020029U00 flex cable is the SATA bridge between the motherboard and the 2.5" bay — a known failure after a drive swap or wear over time.

Specifications

• OEM number: DC020029U00
• Function: SATA + power flex to 2.5" bay
• Compatible: HP ZBook 15 G3, 15 G4, 17 G3, 17 G4
• Type: flex cable with SATA connector
• Condition: brand-new, tested
• Connection: direct ZIF to motherboard

Symptoms of a faulty part

• BIOS shows no SATA drive in the bay
• Drive appears and disappears in Disk Management
• Slow boot (10+ sec extra) due to SATA timeout
• SMART or CRC errors with a drive that's actually fine
• Drive works in a USB adapter but not in the laptop

Installation

🟡 Medium · Estimated time: 45 minutes · Required tools: Phillips PH0, T8 Torx, plastic spudger.
Open the bottom cover, disconnect the battery, remove the old HDD flex from the motherboard and the SATA bracket, then route the new one identically.

Frequently asked questions

Does this flex fit the ZBook 15 G2?
No. The G2 uses a different chassis and connector — this flex is for G3 and G4 only.

Does it work with a 7 mm SSD?
Yes, any standard 2.5" SATA drive (HDD or SSD, 7-9.5 mm) fits.

Do I have to remove the entire motherboard?
No, just open the bottom cover and HDD bay — the flex sits beside the bay.