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Professional PC Diagnostic
Solutions by QiGuan

Trusted manufacturer of POST Cards, Debug Cards, and Motherboard Diagnostic Tools since 2002. Precision-engineered for system stability testing, BIOS error detection, and hardware diagnostics.

Explore Products Visit Official Site

About QiGuan Electronics

Shenzhen QiGuan Electronics Co., Ltd. has been a leading innovator in PC diagnostic technology since 2002. Specializing in POST cards, debug cards, and motherboard testing tools, we deliver reliable, high-precision hardware diagnostics for IT professionals, repair technicians, and system integrators worldwide.

Our products are engineered to detect BIOS errors, monitor system boot sequences, and identify hardware failures with real-time code displays. With over two decades of experience, QiGuan continues to set industry standards in diagnostic accuracy and product durability.

20+

Years of Innovation

Global

Distribution Network

QiGuan Electronics Lab

Our Diagnostic Products

Precision-built diagnostic cards for desktop and laptop motherboards. Real-time error code display, stable signal detection, and advanced troubleshooting capabilities.

MP2C-V3 PCI Diagnostic Card

MP2C-V3 PCI Diagnostic Card

With LCD Display, real-time POST code monitoring for desktop systems.

  • • PCI Interface
  • • LCD Display
  • • Real-time Code Output
  • • Stable Signal Detection
KQCPI4-V4 PCI ISA Diagnostic Card

KQCPI4-V4 PCI ISA Diagnostic Card

Dual interface support with advanced LCD diagnostics.

  • • PCI & ISA Support
  • • High-Contrast LCD
  • • Multi-Platform Compatible
  • • Error Code Logging
MKQCP6A-V3 PCI Diagnostic Card

MKQCP6A-V3 PCI Diagnostic Card

High-performance diagnostic tool with enhanced display clarity.

  • • PCI 64-bit Support
  • • Bright LCD Panel
  • • Auto-Detection Mode
  • • Low Power Consumption
KQCP-SUT PCI Diagnostic Card

KQCP-SUT PCI Diagnostic Card

Ultra-thin design with superior signal processing.

  • • Slim Form Factor
  • • Fast Boot Detection
  • • Anti-Interference Shielding
  • • Plug-and-Play
KQLMET8-SD 8-bit Diagnostic Card

KQLMET8-SD 8-bit Diagnostic Card

Designed for laptop motherboard testing and repair.

  • • 8-bit Code Display
  • • Laptop Motherboard Support
  • • Compact Design
  • • Accurate Fault Isolation

MKQCLP4-SD PC Diagnostic Card

PC tester card for comprehensive desktop diagnostics.

  • • 4-bit POST Code Display
  • • Universal Compatibility
  • • Real-Time Monitoring
  • • Durable PCB Construction

MQP3 3-bit Diagnostic Test Card

For desktop motherboard POST testing and error detection.

  • • 3-bit Code Output
  • • Desktop Motherboard Focus
  • • Simple Interface
  • • Cost-Effective Solution

KQMET4 4-bit Diagnostic Test Card

Reliable tool for laptop motherboard diagnostics.

  • • 4-bit Display
  • • Laptop Motherboard Support
  • • Clear Code Readout
  • • Stable Performance

Stability Digit Test & QiGuan Code Card

Advanced stability testing with proprietary code interpretation.

  • • Stability Monitoring
  • • Custom Code Mapping
  • • High Accuracy
  • • Firmware Upgradable

New Generation PC Diag Card

Next-gen diagnostics with enhanced processing and display.

  • • Modern Design
  • • Faster Response Time
  • • Improved Readability
  • • Broad Compatibility

Kingnostics Diagnostic Card

Premium diagnostic solution for professional repair centers.

  • • High-End Performance
  • • Advanced Diagnostics
  • • Professional Grade
  • • Long Lifespan

Traditional PC Diag Card

Classic design for reliable and straightforward POST code reading.

  • • Simple Operation
  • • Proven Reliability
  • • Easy to Use
  • • Economical Choice

Why Choose QiGuan?

Engineered for precision, durability, and real-world performance in demanding diagnostic environments.

Precision Diagnostics

Accurate real-time code display for fast and reliable hardware fault detection.

High Stability

Engineered for consistent signal detection and interference resistance.

Wide Compatibility

Supports various desktop and laptop motherboards across multiple platforms.

Durable Build

High-quality materials and robust PCB design ensure long-term reliability.

Plug-and-Play

No drivers or software required. Instant diagnostics upon installation.

Global Support

Backed by a global distribution network and technical support team.

20+

Years in Market

50+

Countries Served

10+

Product Lines

100K+

Units Shipped

Frequently Asked Questions

What is a POST diagnostic card?

A Power-On Self-Test (POST) card is a hardware diagnostic tool that displays error codes during system boot. It helps identify hardware failures in motherboards, RAM, CPU, and other components.

Can I use QiGuan cards on laptops?

Yes. Models like the KQLMET8-SD and KQMET4 are specifically designed for laptop motherboard diagnostics.

Do your cards require software installation?

No. All QiGuan diagnostic cards are plug-and-play devices that work without drivers or software.

How do I interpret the error codes?

Each model includes a code reference guide. Common codes relate to CPU, memory, video, and BIOS issues.

Are your products covered by warranty?

Yes. QiGuan offers a standard manufacturer warranty on all diagnostic cards. Contact support for details.

Get in Touch

For inquiries, support, or partnership opportunities, visit the official QiGuan Electronics website.

Visit Official Website

Tel: +8675561285959

Email: [email protected]

Luo Gang Industrial Area, No.4 Zhongyuan Rd, Long Gang District, Shenzhen, China

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