68kMLA Classic Interface
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| Click here to select a new forum. | | eMac Power Supply Issues | Posted by: Arthegall on 2012-05-31 21:07:01
Of course, running Apple hardware test didn't come to mind until after I'd did some blowdrying.
No results yet from the blowdrying, but only did it for five minutes or so.
| Posted by: CC_333 on 2012-05-31 22:00:05
I've pretty much decided to replace the capacitors. It's workable for now, so I will put it on a lower priority until it gets worse. At least I now know what's wrong with it.
Thank you all for your help! I was ambivalent in signing up here, but I finally took the plunge and it has turned up tons of valuable information. I really appreciate this opportunity, and I hope to stick around in this forum for a long while yet.
c
| Posted by: techknight on 2012-06-02 14:48:10
if the picture still looks like a bowtie after blowdrying the entire analog board, then most likely you had a transistor or something fail in the pincussion circuit.
| Posted by: Arthegall on 2012-06-02 15:22:18
Could it be the IVAD cable?
| Posted by: techknight on 2012-06-02 19:30:32
if it is the IVAD cable, then use the old poor-mans trick of wire and aluminum foil wrapping around the IVAD cable, then electrical tape up the wrapping with a wire attached, extruding from the tape to be grounded. the shielding failed in the early runs of the cables. This could be a fix if wiggling the cable doesnt change the results.
Usually, the raster bounces and shifts all over the place if this cable is at fault. Try it. a large majority of 700mhz eMacs were affected with the IVAD cable issue from what I see.
If that dont take care of the issue, then time to troubleshoot the pincushion circuit components for opens and shorts.
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