Welcome to Pinside and the EM forum. There are many people here to help you. Triple Strike is a fantastic game once you get it running properly. For starters, you will need the manual and schematic, you can get them here:

https://www.ipdb.org/files/2652/Wms_TripleStrike0001.pdf

https://www.ipdb.org/files/2652/Williams_1975_Triple_Strike_Schematic_Diagram_continuous.pdf

To additionally help you, it is highly recommended that you read up on EM repair and maintenance here: http://www.pinrepair.com/em/index.htm

Your Triple Strike is probably going to need a good cleaning of switches, the playfield and followed up with a good waxing. Search the forum for proper playfield waxing.

Very common problem on Triple Strike. Many of us here have had it. Read the final post in this thread for solution. Just regular tape will work or a piece of Mylar. I used Mylar.

https://pinside.com/pinball/forum/topic/williams-triple-strike-bonus-issue#post-2914833

Single player only