Commodore 64 Assy No. 250469 Rev. A repair log with a broken 8580R5 SID sound chip at U9

Assy 250469 Rev. A #1

This is an Assy no. 250469 Rev. A short board. The machine would boot normally and then within 30 seconds the screen would look like the one below with a ready message and no blinking cursor.

IMG_3356 IMG_3365

When I touched the different chips on the board, I noticed that the SID chip (MOS 8580R5) got extremely hot. When replaced with a working SID, the machine was brought back to normal operation and the temperature of the replaced SID was normal.

IMG_3367  IMG_3371

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