C64

BID: 16300_N0HME 
FROM: N0HME
SUBJECT: COMMODORE IC CHIP CHART

--QRX LYNN, LOADING MESSAGE (18)

  C64 IC CHART       
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C-64 IC CHIPS PROBLEMS & SOLUTIONS

CURSOR JUMPS TO HOME POSISTION - 6510

ABNORMAL COLORS IN LETTERS - 82S100

DIFFERENT CHARACTERS DISPLAYED & CURSOR LOCKS UP WHEN TURNED OFF/ON -6510,6567

SYSTEM WONT RESET & +RESORE+KEY DOESNT WORK - 6510,82S100,901227-01

CURSOR DISAPPEARS AFTER WARM UP - 6526

+SYNTAX ERROR+DISPLAYS AFTER WARM UP -  ROM 901226-01

LONG PROGRAMS WONT LOAD & SYSTEM RESETS AFTER WARM UP - 6510,901226-01

KEYBOARD DOESNT WORK RIGHT AFTER WARM  UP - 6526,901226-01

CASSETTE MOTOR KEEPS RUNNING - 6510

CURSOR DISAPPEARS WHEN CASSETTE IS      PLUGGED IN - 6510

CASSETTE RUNS SLOW,PROGRAM SEEMS TO LOADBUT NOT RUN - 6510

BLANK SCREEN ON POWER UP -6510,6567,    82S100,8701

NO CURSOR,INTERMITTENT BLANK SCREEN,    INTERMITTENT GRAPHICS -6510

POWERS UP WITH +PRESS PLAY ON TAPE+     MESSAGE & THE DISPLAY BANKS -6510

CURSOR LOCKS ON POWER UP -6510

CURSOR GOES TO HOME WHEN+RETURN+IS      PRESSED AFTER RUN -901226-01

POKE COMMAND DOESNT WORK -901226-01

JOYSTICK DOESNT WORK RIGHT -6526

NO CHARACTER LETTERING IS DISPLAYED ON  THE SCREEN -6526,6567,82S100,901225-01

DISPLAYS GRAPHICS INSTEAD OF LETTERS -  6526,6567

POWER UP MESSAGE BUT NO CURSOR-6526,    901226-01

+DEVICE NOT PRESENT ERROR+DISPLAYS WHEN DISK IS USED -6510,6526

DRIVE CONTINUES TO SEARCH WHILE TRYING  TO LOAD -6526

WRONG SCREEN COLOR OR NO COLOR AT ALL - 6567,82S100

KEYBOARD DOENT FUNCTION -6526

CASSETTE RECORDER PROBLEM -6510,6526

FLASHING COLOR OR BLOCKS -82S100

GAME CARTRIDGE DOESNT FUNCTION -82S100,901227-01

UNIT DEAD (30-40 POSSIBILITY) -82S100

USER PORT DOESNT FUNCTION (EX. TU,TNC) 6526

NO SOUND -6581

MISSING NOTES -6581

GAME PADDLES WONT FUNCTION -6526,6581

WHITE BAND SCROLLS DOWN SCREEN(60 HZ HUM-CHECK POWER SUPPLY & VR2 REGULATOR

WAVY SCREEN AFTER WARM UP -6567 & CHECK EXTERNAL POWER SUPPLY

+OUT OF MEMORY ERROR+ON POWER UP -CHECK RAMS 4146 U1-U12, U21-U24

BLACK BAND SCROLLS ON SCREEN AFTER WARM UP -EXTERNAL POWER SUPPLY & VR2 REGUL.

POWERS UP WITH GRAPHICS & BLINKING      CURSOR -CHECK U14

POWERS UP WITH CHARACTERS DISPLAYED AS  BLOCKS - CHECK U26

AFTER A FEW MINUTES,CHARACTERS ALL OVER SCREEN THEN LOCKS UP - POSSIBDE OWER   S

UPPLY ROBLEM

UNIT COMPLETELY DEAD - POSSIBLE POWER   SUPPLY FAILURE

FROM KA8TSU BBS ON 28.120         RELAYED  BY...N0KGX...GENE

THE END!