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If the display shows two squares rotating up and down. This pertains to the 40H only.
- Push the power button.
- If the unit has been in operation for a while and all of the sudden the squares begin rotating. This means power was lost somehow while unit was running.
- The flow meter wire is loose on the computer, or the connector where the two wires connect between the computer and the flow meter are loose.
- The remote itself may have a short, or the power cord going to the computer one of the prongs may not be making a good connection threw the connector or the computer.
If all of this has not fixed the issue then you may have a faulty computer.