You can often extract the binary from the official HP Support site by downloading the latest "SoftPaq" (the .exe driver file) and using a tool like 7-Zip to extract the raw firmware image.
The clip may have shorted a component, or the binary file used is from an incompatible motherboard ROM family. Try an older version of the official SoftPaq BIOS. hp pro 3500 series mt bios bin file fix
Open or your preferred CH341A software on your secondary PC. You can often extract the binary from the
: The keyboard LEDs (Caps/Num Lock) blink twice, or you hear two beeps. Boot Loops : The PC starts and stops repeatedly every few seconds. HP Support Community 1. The "Soft" Fixes (Try These First) Before attempting to flash a file, try these standard recovery methods: Open or your preferred CH341A software on your secondary PC
The motherboard emits repetitive beep patterns (often 5 beeps).