Verify Video Signal Path Integrity; Video Controller / Touch Screen Display Troubleshooting; Initializations Did Not Complete - Keysight N9040B Option 508 Service Manual

Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process

Verify Video Signal Path Integrity

The video controller is located on the A4 Processor assembly and is routed to
the front panel LCD through a few interconnections. These interconnections
are:
— A4 Processor assembly to A7 Midplane Board
— A7 Midplane Board to A8 Motherboard assembly
— A7 Midplane Board to A1A2 Front Panel Interface assembly via W1 ribbon
— A1A2 Front Panel Interface to A1A3 Touch Screen Display via A1W1
If all of these connections are properly made and none of the cables are
damaged proceed to
Troubleshooting".

Video Controller / Touch Screen Display Troubleshooting

The video controller is located on the A4 Processor assembly. The video signals
that the controller outputs are LVDS. As described above, these signals are
routed to the Touch Screen Display via the A7 Midplane Board, A8
Motherboard, and A1A2 Front Panel Interface board.
On the A1A2 Front Panel Interface board the LVDS signals are buffered and
then sent to the Touch Screen Display via the A1W1 Flex circuit.
The most likely cause for a video problem is the A4 Processor assembly;
however it could be the result of a defective Touch Screen Display.

Initializations Did Not Complete

During the initialization of the UXA Signal Analyzer Application the following
messages will be displayed on the application splash screen:
— Checking for required services (1 of 7)
— Initializing License Services (2 of 7)
— Initializing Hardware (3 of 7)
— Initializing Data Services (4 of 7)
— Initializing SCPI Services (5 of 7)
— Initializing Message Services (6 of 7)
— Initializing Front Panel EEPROM Services (7 of 7)
If there is a problem with any of these initializations not completing or causing
an error message to be displayed refer to the instrument Event Log. This can
be accessed by using an external USB keyboard and mouse and selecting
Start, Run, enter Eventvwr.exe, and select OK.
64
cable
flex-circuit
"Video Controller / Touch Screen Display
Keysight Technologies N9040B UXA Signal Analyzer Service Guide