What safety precautions should I follow when replacing the SMPS board on the Samsung Xpress SL M2020?
When replacing the SMPS board, you must wait 5 minutes after unplugging the power cord before handling the board, as electric discharge from residual charge can cause an electric shock. Always ensure power is fully disconnected before servicing or replacing any electrical parts.
From the official HP Samsung Xpress SL M2020 Laser Printer Series manual, page 7
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