So was having issues with the right bottom flipper on HS2 stuttering a bit and took it a apart and replaced the coil sleeve and the problem seemed to go away. Everything was working for for 48 hours or so (I even put up a new high score). But then it started happening again and when I took it apart to see if I spotted any other issues and when I put it back together I had somehow lost high power to the flipper completely. now, the problem is consistent and it appears to fire very slowly and weakly each time only (presumably its just the hold that is working). EOS appears to be open and working properly. I was inclined to think it was a mechinical issue due to the original problem and temporary fix, but I'm not sure. Perhaps I blew something with the earlier mechanical issues? I'm pretty frustrated and taking a break to play the new pin we just picked up but figured I'd post here to see if any of you pros have any thoughts to give me some direction when I pick this back up tomorrow or later in the week. Thanks for any help!

Ok, this is a 1629 coil (blue) and I didn't have an extra one of those around but i did have a lower power 1630 coil (red) and I swapped that in and same problem. I'm getting about 60 volts on all of the lugs. So unless the other coil is bad, Im guessing this is an electrical problem

Ok just to confirm i swapped the left coil into the right mech (without changing the wiring) and it fired fine with the left flipper button. So any suggestions of where to go from here?

think I found the problem; there is a rottendog replacement fliptronics board in there and apparantly the Q4 transistor is bad. Unfortunetly this seems to be a werid type of transistor (FQP13N10L) that seems to be fairly unique to Rottendog boards so I'll have to order it. But hopefully that does the trick. Thanks for the help.

alright, this sucks. I replaced the transistor and now I've got high power back but flipper is intermittently chattering a bit or not holding (every 10th flip or so). I went to check the EOS switch (which was testing fine before) and now I'm getting nothing on the swtich test. Checked the other 2 EOS switches and nothing there either. Thoughts? I appreciate all the help....as you guys can tell, I suck at this stuff. I figure I screwed something up on the fliptronics board when I was replacing the transistor, but I can't figure out where the EOS switches connect to that board.

alright reflowed the solder on coil lugs and seems to be ok now. Reseated all the connectors on the fliptronics board and apparently solved my EOS switch issue. Thanks for the help! Glad to finally have a working machine (for now).