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VectorGlow
10th May 2009, 09:42 PM
Symptom: Some colours wrong, for example car sprite colours and the hand at the start of a race. Also the test card colours in test mode
Cure: Bad outputs on pins 12 and 13 of the 74LS298 at location G3

Symptom: Some text a bit mangled
Cure: Broken pin 7 on 27C4001 at location I11

Symptom: Couldn?t adjust sound volume correctly
Cure: A 5K volume pot had been used instead of the correct 4.7K

Symptom: On power up, giving: RAM ERROR AT 00203FFE (sometimes the last three alphanumerics varied)
Cure: Bad OKI MSM6295 at location C6

Symptom: Sound a mess
Cure: Bad OKI MSM6295 at location C6

Symptom: Starting speech ?3 ? 2 ? 1 Go? kept repeating
Cure: Pin 34 (A16) loose on OKI MSM6295 at location C6

Symptom: 1 pixel high horizontal black line across the whole display on every other pixel line. Also colours a bit off.
Cure: Bad output on pin 15 of the 74LS298 at location I3

dezbaz
10th May 2009, 09:45 PM
Some Legendary people here on the forum

Well done!