Take a good look at the PinWiki WPC guide, specifically the section that diagnoses power problems. Follow the steps in order, you never know if yours is one of the less common causes. There is a lot to check before resorting to replacing bridges and caps which might not solve your problem but might cause you to damage traces on the board.
I have a TZ (another power hungry game) that took some effort to diagnose lower than normal 5v. You can see some of the diagnosis work here:
https://pinside.com/pinball/forum/topic/twilight-zone-owners-club/page/170#post-5590748
https://pinside.com/pinball/forum/topic/twilight-zone-owners-club/page/172#post-5599308
PinWiki notes that replacing the LM323K 5v regulator is one of the last things that can be tried after eliminating other potential issues that may be contributing to the problem (remember, this could be a cumulative thing, not just a single issue). This worked for me, removed the LM323K and installed a PSU5 from ezsbc.com. I was able to dial the 5v to exactly where it needed to be. Daniel at EZSBC ships his quality made stuff out quickly, very reasonably priced, and works just as advertised.
This is another link recommended to me during my diagnosis. http://www.pinballrevolution.com/threads/14-twilight-zone-reset-and-the-5v-regulator.3966/
If you need it, there is a YouTube video that shows installation of a PSU5.