HP EliteDesk 800 G2 TWR No Display - Bios

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  • macabook
    🛠️ MSI GP75 Leopard MS-17E71 – No Display, Deep BIOS/EC Troubleshooting
    by macabook
    Hello everyone,

    I’m currently working on a dead MSI GP75 Leopard (MS-17E71) motherboard (i7 CPU, NVIDIA GPU) with a no display/no backlight issue initially. After extensive investigation, I’m at a critical stage involving EC firmware, BIOS/ME region interaction, and possible deep corruption. I'm seeking advanced insight from anyone with experience in EC/BIOS sync issues or PCH-level behavior. Here’s a full breakdown:
    🧩 Initial Issue
    • Board powers on (fans spin, keyboard lights up and can be adjusted, caps lock led lights), but no display or backlight
    • External display (HDMI) shows
    ...
    07-24-2025, 02:17 PM
  • lanovey
    SF314-41 BIOS without internal display
    by lanovey
    Hello there,
    I have a SF314-41 motherboard that i bought impulsively recently, the problem is that i only bought the motherboard only, nothing else. When i tried powering on the board with 19V (soldered on the DC IN port), and then shorting the pin 1-2 of the keyboard, the board is turning on (as indicated by the fan), however it seems like the board is displaying on the internal display as connecting to a display on the HDMI (external) does not display anything.
    I tried connecting a USB keyboard, the keyboard is powered on, however pressing numlock do nothing (supposed to toggle...
    06-13-2025, 02:38 AM
  • surcharge6650
    HP Elitedesk 800 G4 SFF BIOS/EC firmware error (Code 5.2) - Fixable?
    by surcharge6650
    Hello guys,

    I stupidly tried to read out my BIOS & EC flash (with a clamp). This didn't work, I only read FF's. But after this operation, the PC is not longer turning on, just beeps 5 times (and blinks red) then 2 times (blinks white). The manual says this is the error code for: "The embedded controller cannot find valid firmware.".
    I think it locked itself because of my experiment. Is this fixable? I now removed both chips from the board and dumped them, I attach the files in this post hoping someone can help me fix my stupid error. Thanks so much in advance anyone...
    12-11-2025, 09:44 AM
  • cr4zychriss
    [Problem/ Request] Bricked TongFang GK7MRFR BIOS
    by cr4zychriss
    Hello everyone,
    I am requesting urgent assistance to unbrick my laptop, a rebranded TongFang GK7MRFR chassis. The laptop is completely dead following a faulty in-OS EC flash attempt.
    I have successfully used a CH341A programmer and can read/write/verify both flash chips, but using my backups/extractions has failed to restore power. The root cause is likely a corrupted Intel Management Engine (ME) region or an incompatible EC/BIOS pairing. System & Hardware Details
    • Barebone / Chassis: TongFang GK7MRFR
    • MB: MB: GK5MP5X V1.0 Prod :GK5MRFV10T04201310281
    • Rebrand: PC Specialist
    ...
    11-14-2025, 04:04 PM
  • TopPop
    Dell Latitude 5530 BIOS Password Removal Attempted but I Broke the Laptop
    by TopPop
    Sorry for the long story. I have a Dell Latitude 5530 (i7) laptop (South Peak 15 MLK MB DDR4 203102-1 FK8VG$JA) with an admin BIOS password that I want to remove. Service Tag: HYKFPT3. Other than that the laptop worked OK.

    I found a CH341A Black and went looking for the BIOS chip on the motherboard. After trying to read one chip that was a firmware chip but not the BIOS I think I found the BIOS chip labeled Winbond 25Q256JVEN. Altogether I think I found 4 different firmware chips in the laptop. The BIOS chip is a WSON8 6x8. I used the CH341A, NeoProgrammer, and a cheap pogo pin clip...
    12-14-2025, 09:40 PM
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