Quoted from Kkoss24:Man that sounds like a rough go .Congrats on the fix I havnt heard of that one until now
Yeah, it appears that for the premium / LE models that have the moving sarcophagus lock mechanism, that mechanism was originally designed with micro roller switches in the trough. At some point this was discontinued and exchanged for the typical "bent arm" micro switch that we usually see around the playfield.
Since it's release, a fair amount of folks (not everyone) have had problems with this lock mech, and when problems occur in this mech, things can get real screwy, (from miscounting balls, to balls not registering those switches and constantly dumping balls, being unable to advance mummy multi-ball... on and on, painful).
In my case, I was encountering the same problems. Folks have done a few things, but it appears as though the most durable solution has been to exchange those switches within the trough of that lock mech to micro roller switches. I picked a couple up from Marco last week as I was trying some less permanent methods (posted here last week). In my case, while it helped one issue, it unmasked another, so I went ahead and just changed out both yesterday and I would agree with those from the past, this worked well and all the issues I noticed before seemed to be resolved during gameplay.
I would still love to know any tricks on releasing that captive ball, cuz I had zero luck. Fortunately, I was able to release the nuts/bolts associated with that mech underneath the playfield enough to disconnect the plate that held those switches and make the exchange. when trying to remove that captive ball, I cussed a lot, although once I was able to get that plate off that held the switches, I only cussed a little