The HMT Motherboard Diagnostic Debug Card Series by HuiMinTong provides professional hardware fault isolation and BIOS POST code analysis for desktop PCs, laptops, and workstation motherboards. Featuring four specialized models—TL460s, TL631 Pro, and TL631 Mini—this diagnostic toolkit enables technicians to decode boot initialization sequences in real time, pinpointing hardware faults across CPU, memory, chipset, and graphics subsystems without guesswork.
Available Models & Specifications:
HMT-TL460s Multi-Purpose Diagnostic Main Card (SKU: 401111-01): Classic, versatile diagnostic card supporting standard PCI-E, PCI, and LPC diagnostic interfaces. Features a dual-digit 7-segment digital display showing real-time BIOS hex error codes alongside status indicator LEDs for key voltage rails (+12V, -12V, +5V, +3.3V), clock (CLK), and system reset (RST).
HMT-TL631 Pro Diagnostic Card (SKU: 401111): Flagship 5th-generation diagnostic card engineered for modern Intel (including 10th Gen through latest architectures) and AMD motherboards lacking legacy PCI slots. Features an Actel ProASIC3 FPGA chip, ultra-fast signal sampling, high-precision dual-digit code display, and 4-channel EZ Debug LEDs (CPU, DRAM, VGA, PCH) for instant two-tier troubleshooting. Includes multi-pin flying lead cables for ASUS, MSI, Gigabyte, and ASRock motherboard debug headers.
HMT-TL631 Mini Diagnostic Main Card (SKU: 401111-03): Ultra-compact miniature version of the 5th-gen TL631 series designed for tight chassis spaces, ITX small-form-factor builds, and field service kits. Features an Actel ProASIC3 FPGA core, dual 7-segment POST code display, and 4-channel EZ Debug LEDs for motherboards equipped with dedicated pin-header POST code ports. Includes dedicated Dupont flying lead cable harness.
Key Features:
Real-Time BIOS POST Code Decoding: Instantly captures and displays hex POST codes during power-on self-test, translating boot halts into clear diagnostic coordinates (CPU, RAM, VGA, Chipset, BIOS ROM).
Dual-Tier Diagnosis (Code + EZ Debug LEDs): TL631 models combine precise two-digit hex codes with hardware status LEDs (CPU / DRAM / VGA / PCH) for rapid, glanceable fault identification.
Modern & Legacy Motherboard Support: Covers both legacy PCI/PCI-E buses and modern proprietary LPC/Debug pin headers found on ASUS, Gigabyte, MSI, and ASRock boards.
FPGA High-Speed Signal Sampling: Advanced Actel ProASIC3 FPGA logic processing eliminates code jitter, false reporting, and signal delay, capturing fleeting POST states accurately.
Essential Fault Troubleshooting: Solves common repair scenarios including "no power / no boot", black screen without display, continuous reboot loops, fan spinning without initialization, memory detection errors, and POST code freeze.
How to Use:
Step 1: Select the appropriate interface: insert the card into an available PCI-E / PCI slot or connect the flying lead cable harness to the motherboard's dedicated LPC/Debug pin header according to the pinout diagram.
Step 2: Power on the motherboard and observe the initial clock (CLK) and reset (RST) indicator LEDs.
Step 3: Read the rolling hex code on the digital display and check the status of the EZ Debug LEDs (CPU / DRAM / VGA / PCH). Cross-reference the code with standard AMI/Award/Phoenix/Insyde BIOS post code tables to identify the faulty component.
Package Includes:
1 × Motherboard Diagnostic Debug Card (Model as selected: TL460s, TL631 Pro, or TL631 Mini)
1 × Multi-Pin Flying Lead Diagnostic Cable Set (Included with TL631 Pro and TL631 Mini models)
Target Applications:
Indispensable for computer repair shops, motherboard component-level technicians, IT department maintenance teams, PC refurbishers, and custom PC builders.
