How to connect my lcd kvm and make it display on sreen

this user manual may help you have to configure the switch first with a IP address and subnet mask that will let the switch see the server.
I am not totally up with hp but it looks similar to Cisco switches in that you have to configure the switch. I am studying Cisco at the moment and this seems similar.
http://h20565.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c01931438

HP Af616a KVM Server Console Switch 513735-001 (circa 2003) support is only at HPE.coM
just died today or bought it dead.
is the left rear LED green (power)>
see the word SERVER there,what are your servers?
KVM (keyboard video mouse) adapters are the most tricky PC devices ever invented, (cause is evolution makes them dead.) <<< bingo. (NO PC TOLD) and is a relic with PS/2 mouse ports.

most of us avoid those totally and use free remote app
called "ANYDESK"
ZERO HARDWARE NEEDED JUST NETWORK CONNECTIONS.

DID YOU READ THE MANUAL FIRST,
Some of these only work on HP servers, not PC

the manual is super hard to find now

all the old docs most useful are gone.

https://www.hpe.com/us/en/search-results.html?page=1&q=Af616a&autocomplete=0

Is the laptop actually detecting an output when the KVM is plugged in? Try forcing output with Windows + P (Vista/7) or a function key (not sure what it is for the 8470p).

If you are getting no video then either the KVM Switch is not transmitting video or the cable is defective. I would recommend checking with the supplier of the KVM Switch you are using.

instead of using the KVM use ILO or a local keyboard monitor and mouse. Also try restarting the KVM module before powering up the server

Do you try disabling Screensaver feature on those two servers...might that be causing display prob, if you try pressing any key or it would show screen
But still if it is not working, Check Power saving feature for these two Server, turn off featue to turn off display and harddisk if computer is standy by for......mins

Hope it resolve issue, Best of Luck

1 st you directly connect the lcd to system and see it is showing the display and conncet the vga cable proprly to kvm output socket.

when i start the computer the sreen on the top half of the monitor is discolored. how do i fix this?

By default to bring up the On Screen Display press:

CTRL + CTRL

If you flash the firmware to the latest, you can change that key sequence for the OSD to either PrintScrn, CTRL+CTRL or SHIFT + SHIFT.

KVM switches are hardware based and there is no use software.