This is where the board fails spectacularly for the enthusiast or general consumer.
If your Intel Desktop Board 21 b6 e1 e2 refuses to POST (Power-On Self-Test): intel desktop board 21 b6 e1 e2 specification
The "E1/E2" designation often relates to specific board revisions that Intel locked down tightly. This board was famously criticized for having a locked CPU multiplier and, in some revisions, a locked memory strap. You cannot overclock this board, nor can you upgrade the CPU—it is soldered down. If the CPU becomes obsolete, the entire motherboard becomes e-waste. This is where the board fails spectacularly for