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Hi,
No sign of corrosion. 20V on both USB-C ports. 0,33-0,037A. Fan starts, but no chime, no activity on external USB or image on external display.
L7210/L7220 0,9V which seems ok to me. Where to start?
I looked wrong. It took 0.37A.
Just replaced BIOS from a donor board before I read your post. It shows the image of apple now. I don't have BIOS programmer. Have to order reprogrammed BIOS chip from Ebay.uk.
Thanks 2informaticos