Nvidia DGX A100 Service Manual page 23

2. Pull the motherboard tray out of the system until it locks, then press the two buttons on
the top of the lid to release the tray and finish pulling the tray out of the system.
Place the tray on a solid, flat work surface.
3. Loosen two rear thumbscrews on the motherboard lid.
NVIDIA DGX A100 System
Motherboard Tray - Removal and Installation
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