Keysight Technologies P Series - Power-Up Problems; Basic External Checks; Basic Internal Checks; Possible Faults

Troubleshooting Guide 5
Keysight N8262A Service Guide 73
Power-Up Problems
Basic external checks
– Check that the mains power source is live
– Check the mains cable for any obvious damage
Basic internal checks
– Check/reseat the cable between the line module and the PSU
– Check/reseat the cable between the PSU and the mother board
– Green LED DS1: If this is off, then the PSU may be faulty
– Green LED DS4: This should come on when the power button is pressed
– Green LEDs DS2/DS3: These will flash on and off during normal operation
Possible faults
–PSU
– Mother board
– Rocker switch defect
– Loose front panel board ribbon cable