Troubleshooting Lcd Display Problems - Keysight Technologies N5221A Service Manual

Troubleshooting
Power Up Troubleshooting
Figure 4-3 Fan Power Cable Connections
3. If the correct voltage is present at each connection and the fan connectors
4. If the correct voltage is not present, suspect a defective A14 system

Troubleshooting LCD Display Problems

This procedure is intended to isolate the faulty assembly when the display is
dark. If the display is lit, but the color mix is faulty, refer to
page
There are no front panel adjustments for intensity and contrast of the LCD.
1. If the display is dim, the A3 display assembly is defective. Refer to
4-14
are in good mechanical condition, suspect a defective fan. Refer to
"Removing and Replacing the Fans" on page
motherboard. Refer to
Motherboard" on page
4-19.
"Removing and Replacing the A1–A3 and Other Front Panel
Subassemblies" on page
"Removing and Replacing the A14 System
7-18.
7-10.
Keysight N5221A/22A Service Guide
7-56.
"A3 Display Test" on