SE30 and simasimac

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SE30 and simasimac
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Hi

I'm new here. Good morning everyone.

I have a SE30 with this problem: the simasimac image.

SE30 has been recapped and It seems to boot correctly because when you turn it on you can hear the initial chime and

and the noises of loading from the hard disk, but the image does not change.

I've tested 2 chip of videoram, changed LS166, I replaced all the PALs with a definitely working chipset.

If i remove all the ram simms i can hear the bad chime but the image still the same.

tThe problem seems to be strictly related to the video section, but where?

LS393 ? F253 ?

Thanks

Fabio