Didn't someone post that the 8250 has the same motherboard? You might
start with those tech manuals, middle light 'not blinking' may be a dead
processor or a controller chip... :/
Is the lower drive blinking in any pattern (usually a count followed by
a pause, if so, what is the count...) As mentioned earlier there are
two processors on the Dual Drives, which makes it more challenging.
Nicolas Welte wrote:
>
> Hi,
>
> a friend of mine aquired a non working CBM8280 8" dual disk drive. He tried
> to repair it, but without service information this is a difficult task. He
> also probably doesn't want to ship it to me, since it is such a huge
> monster.
>
> He says the upper drive LED (red) is constantly on, the lower drive LED
> (red) is blinking. Otherwise the drive seems to be dead. He also tried to
> replace all socketed chips, the last one being the 1797 FDC. I found a 2797
> (uh, 5V version of 1797) somewhere and I sent it to him, but it didn't
> help. Does anybody have ideas or maybe even schematics?
>
> Nicolas
> -
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