Determine the direction that notch is in relation to the direction the main board. ATTENTION TO DETAIL: There is a notch at one end of the EPROM chip. Place the MPU tray on a flat surface and locate the GAME PROM socket on the board. (Slant top machines: open the belly door to access the MPU tray on the left side of the machine, then slide the board towards you using the metal handle built into the tray.) Do not use force there is a risk of damaging the motherboard if you use excessive force. Lift the knob straight up to remove the MPU board from the fixed motherboard that is secured to the bottom of the machine. Locate the round knob on the silver MPU board tray that is behind the hopper. Typically most problems with an IGT S+ slot machine are not cured with the use of a RAM clear chip, so only do the following procedure if you're sure you really need to do a full clear. This is typically only needed if your machine is in a '61 loop', or has some other unusual error. With a nod to Ohio Gaming for the following info which used to be posted on their website, but appears to have gone MIA in a recent site redesign, here are the steps necessary to perform a RAM clear (to clear the EEPROM data) on an IGT S+ slot machine.

For more details, please visit this thread: NEWBIES: PLEASE DON'T CLEAR YOUR IGT S-PLUS SLOT As such, using a clear chip should be a last resort unless you are familiar with S+ setup and programming. While there is nothing wrong with using a clear chip, it will reset all settings to the factory default which may require additional programming to get your machine back to its current setup. If you are new to IGT S+ slot machines, do not start here, post the issue with your machine in a new post in the IGT S+ section and you will receive assistance on how to resolve your issue. Most IGT S+ errors can be resolved without the use of a clear chip.

Using a RAM clear chip is the last resort in troubleshooting.

Igt reset slot machine