The system unit must be turned off from the power, and also turn off all the wires from it.
Wipe the back wall of the block with a damp rag. You also need to wipe all the wires that you disconnected.
The system unit must be turned off from the power, and also turn off all the wires from it.
Wipe the back wall of the block with a damp rag. You also need to wipe all the wires that you disconnected.