I just had this problem with my TZ. First look for anything that maybe shorting any of the switches that double close. That means lamp sockets, leaf switches, micro switches, and all switch wires. If you can not find a physical short turn the game off, remove connectors j206 and 209 and power up the game again. After boot up check voltage on every slot on the female side of both connectors. there should be no voltage (or very low varying voltage) on any wire from either connector. If you read full voltage on any wire follow this link to finish trouble shooting
http://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Switch_Matrix_Problems
This post may help as well
http://pinside.com/pinball/forum/topic/new-mpu-replacement-precautions
If your problem is anything like mine the main issue is your MPU has crapped itself for some reason, follow the WIKI, then decide if you can replace the U20 yourself, buy a replacement board, or have it repaired by a pro.
Good luck

You are welcome. Don't give up! I'm not familiar with TOTAN, but these type of problems are universal with most SS pins. from watching your video i think that you have the same problem I had. I recommend you build your own test jumper from a spare .156 IDC conector. Just cut it down to a single pin and punch down a wire into it. This way you have a simple jumper to test each pin with without having to worry about touching two different pins together at the same time. If you need more clarification I can post a picture of what I mean later.
JLB