Mr. Green has developed a modern version of the hardware “POST Card,” a tool used to diagnose computer issues through error codes. This innovation is a response to the absence of conventional PC speaker beeps in some systems for error indication during Power-On Self Test (POST).
In the 1990s, hardware POST Cards were commonly employed to interpret error codes, and now Mr. Green has constructed a similar tool using contemporary components. He created this solution to troubleshoot a problematic x86-based firewall appliance that lacked a PC speaker. By connecting a Raspberry Pi Pico to the motherboard’s Low Pin Count (LPC) bus, POST error codes were captured and displayed using LEDs.
This newly developed POST card is adaptable for use in diagnosing POST-related issues across various x86 systems featuring an LPC bus. Detailed instructions and resources for building the device are available on Github. This initiative reflects a continuation of similar projects in the past. For more insights, a video demonstration is provided after the article.
Items you might find in this article and video:
- Raspberry Pi Pico WH with pre-soldered headers
- 830 Point Solderless Breadboard
- Breadboard Jumper Wire Kit (140pcs)
Read more: BIOS POST Card Built Using Raspberry Pi Pico