Hardware Model Specification

NVIDIA HGX H100 8-GPU Baseboard Diagnostics

Classification: Enterprise AI & High-Performance Computing Equipment

Hardware operational fault codes, protection alarms, LED blink sequences, and step-by-step diagnostic fixes for the NVIDIA HGX H100 8-GPU Baseboard.

1 Documented Faults • Full Multimeter & Safety Isolation Procedures

Indexed Fault Codes for HGX H100 8-GPU Baseboard

Step-by-step resolution manuals and root cause matrices

1 Codes

CODE CUDA error 719 / NVLink Fatal Error Severity: Critical Difficulty: Advanced

NVLink Transmission Failure Error 719

CUDA error 719 (cudaErrorLaunchFailure) manifests during multi-node all-reduce training when the NCCL Watchdog timer trips due to hardware-level uncorrectable transmission errors on fourth-generation NVLink interfaces, halting GPU-to-GPU memory fabric transactions.

⏱ 45-90 Mins Troubleshoot Now →