Solder
Member
Am getting five tones on powering on a Killer Instinct board - screen is filled with white horizontal lines. Am guessing this is indicating a failed RAM, but which one does five tones indicate?
Can't seem to find anything in any documentation.
Edit - found them:
0 Tones - Check Hardware
1 Tone - All OK
2 Tones - Bad U10 Checksum
3 Tones - Bad U11 Checksum
4 Tones - Bad U12 Checksum
5 Tones - Bad U13 Checksum
6 Tones - Bad U33 Checksum
7 Tones - Bad U34 Checksum
8 Tones - Bad U35 Checksum
9 Tones - Bad U36 Checksum
10 Tones - Ram Test Failed
In this case it was U13 that was corrupted - replaced that with a newly programmed 27C040 and it now boots with the normal single tone but the screen is still full of horizontal white lines. Connections on the main IC (with the heatsink) are all good. Hmmm.
Can't seem to find anything in any documentation.
Edit - found them:
0 Tones - Check Hardware
1 Tone - All OK
2 Tones - Bad U10 Checksum
3 Tones - Bad U11 Checksum
4 Tones - Bad U12 Checksum
5 Tones - Bad U13 Checksum
6 Tones - Bad U33 Checksum
7 Tones - Bad U34 Checksum
8 Tones - Bad U35 Checksum
9 Tones - Bad U36 Checksum
10 Tones - Ram Test Failed
In this case it was U13 that was corrupted - replaced that with a newly programmed 27C040 and it now boots with the normal single tone but the screen is still full of horizontal white lines. Connections on the main IC (with the heatsink) are all good. Hmmm.
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