This document is a FCC and DOC Statement on Class B.
This manual provides the FCC and DOC compliance statements for the NF4E91‑206G motherboard, describing the Class B digital device limits and recommended measures to reduce radio‑frequency interference. It also specifies the requirement for shielded interface cables to meet emission limits.
The latter part of the document is a detailed troubleshooting guide covering common issues such as no video output, power‑up failures, floppy‑drive problems, hard‑drive errors, parallel‑port and serial‑port communication, keyboard non‑response, and motherboard installation checks. Step‑by‑step checks and corrective actions are listed for each symptom.