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This procedure assumes you are changing the EEPROM (E2) chip, but not the ECPU board. <br />1. Switch Off power to the console. Open the left front door of the console and locate the ECPU board <br />[reference Figure 1 on page 61. <br />2. Remove the ECPU board following the instructions in "Removing the ECPU Board" on page 5 with one <br />exception - DO NOT turn the Battery Backup switch OFF as instructed in that procedure. <br />A <br />3. Locate the E2 chip on your ECPU board (see Figure 2 on page 7 or Figure 3 on page 8). <br />4. Remove the E2 chip following the instructions shown in Figure 4 on page 9. <br />5. Replace the E2 chip following the instructions shown in Figure 5 on page 9. <br />6. Replace the ECPU board following the instructions shown in Figure 6 on page 10 with one exception - you <br />can ignore step 4 in Figure 6 since you did not turn off battery backup when you removed the board. <br />7. Close the left front door of the console and restore AC power to the console. <br />The display will cycle through the following warm boot screens: <br />SYSTEM WARM START <br />SYSTEM SELF TEST <br />SYSTEM STARTUP COMPLETE <br />At this point front panel display reads: <br />MMM DD, YYYY HH:MM:SS XM <br />ALL FUNCTIONS NORMAL <br />8. You should archive the current system setup data in the blank E2 chip following instructions in "Record the <br />System Setup Into the EEPROM Chip" on page 4. <br />15 <br />