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| No video on SE/30 |
Posted by: joethezombie on 2016-08-22 09:16:37
I was given a non working SE/30 logic board. I put it in my working SE/30, and nothing happened when I turned it on. So, I washed the board and recapped everything but the axials. Now when I put it in, I hear good startup chimes, and the hdd kicks up, and the the drive indicator flashes like everything is working, but the screen remains completely blank. I'm guessing I have some trace damage. I downloaded a schematic and will go continuity hunting, but am looking for any insight on where the problem might be.
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Posted by: SlateBlue on 2016-08-22 09:35:10
Check that your screen brightness is turned up.
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Posted by: joethezombie on 2016-08-22 09:40:47
Yeah, I twisted the brightness knob full stop both directions. My good logic board shows video, so it's definitely something on the bad board.
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Posted by: techknight on 2016-08-22 10:11:34
a bad UE8 can cause this.
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Posted by: bibilit on 2016-08-22 12:33:46
I will trust Technight a 100% had a similar problem and UE8 was bad:
https://68kmla.org/forums/index.php?/topic/28003-mac-se30-screen-too-bright-with-scan-lines/
Mine had bright lines, but UE8 can show a blank screen also.
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Posted by: joethezombie on 2016-08-23 18:16:36
Working on the continuity testing right now. In case of UE8 replacement, has TI SN74LS166AD been proven a working replacement?
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