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64 TROUBLESHOOTING GUIDE (Continued)

SYMPTOM
POSSIBLE SOLUTION
When loading from cassette, the 'SYNTAX ERROR' message is displayed. Check U20 (556 IC)
DEVICE NOT PRESENT ERROR is displayed when disk is used. Check U1 (6526 CIA)
U7 (6510 MPU)
R28, R29, R30
Disk drives continue to search when trying to load. Check U2 (6526 CIA)
When loading from disk and any key of the 4th row of the keyboard is pressed, the cursor goes to home position. Check U20 (556 IC)
R35 (Possible Bad Connection)
When loading from disk, a 'FILE NOT FOUND' message is displayed. Check U4 (ROM)
U2 (6526 CIA)
OUT OF MEMORY is displayed when disk is used. Check U20 (556 IC)

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Read the small print. Last updated September 05, 2020.