7-3 Operating Problems Troubleshooting
7-2 PN: 10580-00303 Rev. D Model MS20xxB MM
Instrument Boots with No Display
Instrument produces a ding sound after a while, but with no display:
1. If the display is dim, then check the Brightness setting under the System Menu | System Options.
2. LCD Backlight Inverter PCB may have failed. Replace LCD Backlight Inverter PCB.
3. LCD may have failed. Replace the LCD Display Assembly.
4. The Main PCB may have failed. Replace the Main PCB Assembly.
Boot-up Self Test Fails
The instrument boot-up self test fails with an error message:
1. Perform a Master Reset (Press Esc and On/Off keys to turn on the instrument after power has been off).
2. The Main PCB may have failed. Replace the Main PCB Assembly.
7-3 Operating Problems
Battery Pack Charging Problems
1. Refer to Chapter 5, “Battery Information”.
Touch Screen Problems
Instrument boots correctly, but the touch screen does not react.
1. The touch screen may have lost its calibration data. Press Shift then (0) zero to enter the touch screen
calibration procedure. Follow the direction on the screen.
2. Ensure that instrument firmware version is 1.50 or greater. If not, install the latest firmware version
and repeat the touch screen calibration as described in Step 1.
3. Replace the touch screen.
Vector Network Analyzer Problems
Lock Error Message
1. VNA Port may have been damaged, or Main PCB Assembly may have failed.
2. Replace the Main/VNA PCB Assembly for MS202xB or the Main/VNA/DSP PCB Assembly for MS203xB.
Measurement Problems
1. Inspect VNA Port 1 and Port 2 connectors for damage.
2. Inspect the Open, Short, Load and cables for damage. Verify their operation on a suitable test
instrument.
3. Main PCB Assembly may have failed or may have been damaged. Replace the Main/VNA PCB Assembly
for MS202xB or the Main/VNA/DSP PCB Assembly for MS203xB.
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