Pegatron 2ad5 Manual Link -

One short beep followed by one long beep usually indicates a memory initialization error. Reseat your RAM or try a different slot.

HP Support - Joshua Motherboard Specifications pegatron 2ad5 manual link

Yes, the board supports 3rd Generation Intel Core i7-37xx series processors. However, ensure your Power Supply Unit (PSU) can handle the increased TDP, as many OEM units are rated for only 250W–300W. One short beep followed by one long beep

While the H61 chipset can technically handle more, the 2AD5 is hardware-limited by its two slots. You can install two 8GB sticks for a maximum of 16GB. Troubleshooting Tips However, ensure your Power Supply Unit (PSU) can

The Pegatron 2AD5 generally uses a UEFI-based BIOS. This is important when installing modern Graphics Cards (GPU). Some newer cards (like the GTX 10-series or RX 500-series) may require a BIOS update to "Version 8" or higher to bypass the "blue splash screen" hang during boot.