have to measure what the +5volt is at on the power supply and ON THE BOARD
those power supplies can drift over time and hopefully yours has drifted DOWN so as to not operate the game correctly but sometimes they can drift UP and not operate the game correctly. that's why you need to measure it at both places. another reason to measure it in both places will tell you if theres a problem in between the two especially inside the connector, not likely but sometimes the pins inside the connector can not grip the connector tight enough and poor electron flow can cause a problem
bust out your multimeter and measure what the +5v is and report back
you can turn the +5volt up a little but over 5.25-5.35 can start to fry chips so don't be just turning it up without a multimeter connected
we want to rule out the PS as the problem so you don't go buy a hard drive and put it in and have the same problem