AAEON SBC‑656 is a compact single‑board computer based on the Intel 440BX chipset, featuring an integrated Celeron CPU, 2 MB SDRAM display memory, LCD output, Ethernet, and SSD support. Common failure points for this class of industrial SBCs include power supply degradation (especially the 5 V rail), overheating of the CPU socket, capacitors on the main board, and connector corrosion on the PCI/ISA slots. First‑check diagnostics: verify all input voltages with a multimeter, inspect the board for burnt or bulging electrolytic capacitors, and test the LCD and Ethernet ports for proper signal integrity; review any posted error codes from the BIOS or operating system logs.[oss-gpt-20b]