Quoted from Eric_Manuel:

In the lengthy process of migrating from the original "punch down" connectors to the .156 08-52-0113 Trifurcon Connectors. The original punch down connectors on a lot of old machines come loose, or barely make a connection. Eventually cause a fire or failure.
This process not only provide an new, clean surfaces for the electrical connections, but also mandates a close inspection of everything. Yes, that is a new Rottendog Driver Board in the background. Love their products...redesigned, quality made and plug and use.
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Quoted from Zitt:

Check for bad column driver if it's a column.
Might be a bad connection somewhere if not a driver.

Quoted from Manny65:

The last 2 check switch in your list are the same - was that supposed to be another switch or was just a duplicate by mistake? If you go into switch test mode do each of the above switches work properly?
In regards to the delta ramp post, it is made up of 2 posts - https://www.marcospecialties.com/pinball-parts/02-4659-1 goes into the PF and would have a rubber sleeve on it, and then https://www.marcospecialties.com/control/keywordsearch?SEARCH_STRING=02-4934 screws into the top of the first post to help secure the wireform. These parts are listed in the manual on Posts page (pg 2-33)

Quoted from Manny65:

Need to identify the issue first
Go into Switch Edge test (T1), look at the switch matrix picture on the DMD - none of switches on the far right column should be highlighted. Then stage the right flipper button - this will trigger the lower right flipper and on the screen it'll light F1 and F2 (the top 2 switches on the far right column), then push the flipper button fully in which will trigger the upper right flipper and on the screen it'll also light F5 and F6 on that column. Is this what you see?

Quoted from Manny65:

Ok that shows none of the EOS switches are working
1. Lift the PF and activate the flippers - while the flipper bats are up (aka energised) look at the EOS switch on the flipper mech and verify that it has physically closed
2. Check and reseat J906 on the fliptronics board which connect to the EOS switches - retest in switch test mode
3. If no luck, remove J906 and while in switch test mode jumper J906-6 (far left pin) to one of pins 1, 3, 4 or 5 - do you see the switch closure on the DMD? Given each of the board's two LM339 chips do a combination of EOS and flipper switches and the flippers work I suspect that they are fine and issue is with the common ground pin/wire. If this test shows EOS switch closures on the DMD then the issue is with the ground wire or the socket; if the jumpering test doesn't show switch closures then I'd suspect solder cracking on pin J906-6