ocr: 64 - TROUBLESHOOTING GUIDE (Continued) SYMPTOM POSSIBLE SOLUTION When loading from a cassette, the Check U20 (556 IC) SYNTAX ERROR' message is displayed. DEVICE NOT PRESENT ERROR is Check U1 (6526 CIA) displayed when disk is used. U7 (6510 MPU) R28, R29, R30 Disk drives continue to search when Check U2 (6526 CIA) trying to load. When loading from disk and any key of Check U20 (556 IC) the 4th row of the kcyboard is R35 (Possible Bad Connection) pressed, the cursor goes to home position. When loading from disk, a 'FILE NOT Check U4 (ROM) FOUND' message is displayed. U2 (6526 CIA) OUT OF MEMORY ...
