Power subsystem

Power-on checks

Turn on the product. If the control panel LEDs do not illuminate, perform the power on checks to find the cause of the problem.

1.Verify that the product is plugged into an active electrical outlet that delivers the correct voltage.

2.Verify that the power button is in the on position.

3.Make sure that the product makes the expected sounds during startup.

NOTE: Make sure that the overcurrent/overvoltage protection circuit is not activated in the low voltage power supply. Turn the product off, disconnect the power cord, wait a few seconds, reconnect the power cord, and then turn the product on. If the product does not function, the fuse melts, or the power supply is malfunctioning, replace the engine controller PCA. See Engine controller PCA on page 59.

94 Chapter 2 Solve problems

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HP M1536dnf CE538ABGJ manual Power subsystem, Power-on checks