50 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide
Boot Up and Initialization
Potential Problems During Boot Process
Instrument Hangs at the BIOS Splash Screen
Troubleshooting an issue causing the instrument boot process to hang during
the BIOS splash screen is being displayed, or shortly thereafter is going to be
limited. The initial splash screen is displayed by the A5 CPU BIOS, and there is
no access to the BIOS settings or controls, even for servicing the instrument.
But, there are a few things that can be checked.
1. Turn the instrument off, remove the AC power cord, and then remove the
instrument outer and bottom inner cover. Refer to Chapter 15, “Assembly
Replacement” in this manual.
2. Connect the AC power cord to the rear of the instrument and turn the
instrument on by pressing and releasing the front panel power switch.
Verify that all the power supply voltages turn on. See Chapter 8, “Power
Supply” in this manual for information on how to verify power supply
voltages.
Are all the power supply voltages at the proper level?
a. If yes, proceed to step 3.
b. If not, go to Chapter 8, “Power Supply” to determine why all power
supply voltages are not working properly.
3. Attempt to enter the boot up service menu by turning the instrument off,
hold the Preset key pressed, turn the instrument on, and release the
Preset key after 10 seconds.
4. If the instrument enters the boot service menu see Chapter 5, “Service and
Utility Menus” for information on how to scan the internal memory for
errors and start the instrument with no hardware support.
5. If the boot service menu does not provide any help in resolving the
problem, replace the A5 CPU assembly.
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