swansond@cube05.csus.edu (Dennis Swanson) (12/14/90)
A couple of nights ago I fired up my Mac Plus (Minus?) and saw that the screen was entirely black except for a line of pixels streaking horizontally across the top of the screen. After several reboots it went away and I forgot about it. Well, last night I got the whole left side about 4 pixels wide streaking across a blank screen, and having been told the day before that whacking the case a few times might help, I did just that, and with success. However, I do not wish to continue physically abusing my machine, and someone told me that the analog board is bad and by running it I'm risking frying the motherboard also. I know the Plus has sort of a reputation for the power supply going -- can anyone tell me if this is related? If anyone out there has had a similar problem, would you please let me know if and how you resolved it? I've been quoted a price of $186 for a new analog board no more robust than the one I have, and that scares me. Den ....................................................................... : Dennis M. Swanson : Macintosh Lab Assistant/Computer Science Student : : swansond@csus.edu : University Computing and Communications Services : :......................................................................:
omh@cs.brown.edu (Owen M. Hartnett) (12/14/90)
In article <1990Dec13.180851.8997@csus.edu> swansond@cube05.csus.edu (Dennis Swanson) writes: >A couple of nights ago I fired up my Mac Plus (Minus?) and saw that the >screen was entirely black except for a line of pixels streaking horizontally >across the top of the screen. After several reboots it went away and I forgot >about it. Well, last night I got the whole left side about 4 pixels wide >streaking across a blank screen, and having been told the day before that >whacking the case a few times might help, I did just that, and with success. >However, I do not wish to continue physically abusing my machine, and someone >told me that the analog board is bad and by running it I'm risking frying the >motherboard also. I know the Plus has sort of a reputation for the power >supply going -- can anyone tell me if this is related? If anyone out there >has had a similar problem, would you please let me know if and how you >resolved it? I've been quoted a price of $186 for a new analog board no more >robust than the one I have, and that scares me. Perhaps we can add this one to the list of perennially asked questions??? What you have is probably a cold solder joint - probably under the connector which carries the yoke plug. Simply remove the existing solder and resolder the pins on the plug. Check the other solder joints just in case. If that still doesn't work, call SoftSolutions in Eugene, OR to order their Mac Plus power supply upgrade kit, install all the parts, set the voltage (requires a digital multimeter), and voila, now you have a power supply that is *much* better than the original for less than the price of a replacement. Detailed directions for this and other Macintosh repairs are found in Larry Pina's book "Macintosh Repair & Upgrade Secrets" Howard W. Sams, ISBN 0-672-48452-8. The phone number for SoftSolutions is: (503) 461-1136. Their address is: 907 River Road, Suite 98, Eugene, OR 97404 -Owen Owen Hartnett omh@cs.brown.edu.CSNET Brown University Computer Science omh@cs.brown.edu uunet!brunix!omh "Don't wait up for me tonight because I won't be home for a month."