For older boards or those without QR code support, you can perform a hardware reset:

If your device has the LY8008R-5MN motherboard (common for this model), there is a physical way to clear credentials using the onboard pins.

This document surveys methods, considerations, and likely procedures for resetting passwords on devices or systems referenced as “7004T-LM-V3.” The model string appears to be a vendor/model identifier (hardware appliance, router, IP-PBX, IoT gateway, or telecom/industrial controller). Because no single standardized public reference matches that exact string, the exposition synthesizes plausible reset approaches based on common patterns for embedded/network appliances with similar naming, along with security and operational precautions.