🛠 Request: Verified BIOS + EC Dumps for HP Envy x360 15-fe0053dx (JPR50 LA-M794P Rev 1.0)

[whelanm87]

Hi everyone,
I’m working on a non-booting HP Envy x360 2-in-1 laptop and need verified firmware dumps for both the main BIOS and EC chip. I’ll be posting my own backups for reference and comparison.

🔍 System Details

• Model: HP Envy x360 15-fe0053dx
• Product Number: 7HVO3UA#ABA
• Build ID: 23WW2GQZ6D
• Motherboard: JPR50 LA-M794P Rev: 1.0 (2023-03-03)
• Motherboard SPS: N30979-ABA
• LCD SPS: N49271-601
• Date Code: 172380
• Keyboard Type: 0
• Feature Byte:
  3XeB7kN7.Ba.aqewkwBiBVuhcbdxYPgB
  hZnp.praepq0Md4qkdf

🔧 Chip Info

• Main BIOS chip: Winbond W25Q128JVSQ (16MB SPI NOR)
• EC chip: Winbond W25Q80DYSIG (1MB SPI NOR, 3.3V)

⚠️ Current Symptoms

• Laptop does not power on with AC adapter alone.
• When plugged in without battery, I hear a high-pitched coil whine from the board.
• Whine disappears when battery is connected, but system still doesn’t boot.
• No fan spin, no LED activity, no POST.
• I’ve already backed up both BIOS and EC chips using CH341A and will share those dumps.

🔨 What I’ve Done

• Flashed updated BIOS:
  • Used HP vendor BIOS (F.11) and attempted hex modifications to merge identity data.
  • Flash completed but system behavior did not change.
• Reflashed EC from backup:
  • Dumped the original EC firmware from the W25Q80DY chip.
  • Attempted to reflash the backup image, but erase/write operations failed due to protection bits.
  • System remained in the same non-booting state.
• Tried prior BIOS from EFI partition:
  • Extracted the recovery BIOS from the EFI partition on the hard drive.
  • Flashed it externally, but the laptop still shows identical symptoms.
• Current state:
  • AC-only power produces a high-pitched coil whine, no boot.
  • Whine disappears with battery connected, but system still does not power on.
  • No fan spin, LEDs, or POST activity.

✅ What I’m looking for

• Any guidance really...
• A verified working BIOS dump for this board/SKU (JPR50 LA-M794P Rev 1.0, 15-fe0053dx or similar).
• A verified EC firmware dump for the W25Q80DY chip on this board.
• Ideally from a working unit with matching or close product number (7HVO3UA#ABA or similar).
• If you’ve repaired this board before and have known-good firmware, I’d be grateful for a copy.

📎 What I’ll share

• My original BIOS dump (W25Q128JVSQ)
• My original EC dump (W25Q80DYSIG)
• Programmer details and chip IDs if needed

Thanks in advance to anyone who can help. I’m happy to test, verify, and report back results. Let me know if you need any additional identifiers or dump formats.

—Michael

[danito]

[QUOTE=whelanm87;n3766329]
Hi everyone,
I’m working on a non-booting HP Envy x360 2-in-1 laptop and need verified firmware dumps for both the main BIOS and EC chip. I’ll be posting my own backups for reference and comparison.

try