I believe he stated the RAM was replaced (at $16 each? DAMN!).
Replacing a few IC fixed it so it now boots but Video is still bad.
If the CPU was bad, it would not be booting the machine. Does it have sound ("Bong" on power up)?
If it as a SE or SE\30, then it would be simple. What's the circuit that does the display on the 128K/512K/Plus?
Also, looks like the raster is too high - time to look at the analog board for that. Darken the screen to near black and then turn it up until you see a screen image but the unlit areas are as dark as possible from the control knob on the front and then adjust the analog board from there. Replace caps and de-seolder/re-solder joints as needed.
If the RAM was replaced, it would not have an apple logo.
i replaced all of it, but i did not use new ram.
that is the reaseon why apple logo still there.
every ram was tested on the another board using the slot.
(i mean 16 number of ram, not 16$
)
Elfen //
thanks for your comment.
i also think about that. "adjusting voltage and brightness."
but when i connect another 128k logic board with machine, everything was fine.
so i guess the problem is not on the analog board.
and there is bong sound but very very soft (low).
i'm tracing the strange signal for using the osiloscope.
but i can't find the culprit at this time.
i will update as soon as possible.
thanks all.
Edited by gooddi, Today, 04:58 AM.
