I just acquired a Paragon that seems to have an odd issue.

In test, all coils (including flippers) work properly. Some switches work (drop targets) and many do not (roll-overs, top saucer holes, start button, flippers).

In gameplay, neither switches nor coils/flippers work (including the start button, so it's not possible to add addtl players). The game does reset the drops at game start.

Rectifier board is brand new and connections are good (swapped it thinking that was the issue). MPU is the nvram.weebly.com Revision 13 from 2019. So I assume it's not any problematic male pins on the MPU as it's too new and they all look shiny. Checked all fuses with multimeter and all good.

I'm at a loss here...I'm not too well versed in these older Bally games. Any ideas?

Switch test doesn't seem to work accurately. Again, I'm thinking the MPU is funky. In switch test, even the start button doesn't show when pushed (though it starts a game just fine). All of the slam tilts are not contacted, the tilt pendulum is perfect center (also doesn't show in switch test when triggered). When you start a game, it kicks up the drops and plays the little jingle and the GI is on...not sure if it would still do that if it were in tilt?

I just started up a game and turns out.... It does show the tilt lamp lit! So perhaps that's what's going on? Now how do I unstick the tilt short(s). The bobs and slam tilts physically are not tilted.

I started game and then unplugged the lower right MPU cable which eliminated the tilt condition and the game then played as normal. There are still a bunch of insert lights out, especially towards the upper part of the pf. So my next step is to eliminate the tilt physically by following your tips here and then trying to figure out why these inserts are all out.

After cutting a leg of the tilt bob diode, the tilt issue went away! Thanks for your help in this. So do I just need to replace the diode and solder back for tilt to again work as it should?