View Full Version : Mac Classic Checkerboard

October 19th, 2011, 04:12 PM
Well now my Mac Classic has a checkerboard pattern on screen. I assume this is not a good sign? What to do to fix if at all possible? :(

Anonymous Freak
October 19th, 2011, 04:21 PM
See http://www.biwa.ne.jp/~shamada/fullmac/repairEng.html#CheckerFlag.

October 19th, 2011, 04:37 PM
Also Check the caps for leakage.. that is a common problem on those units

October 19th, 2011, 06:33 PM
Also Check the caps for leakage.. that is a common problem on those units

Could be leaking caps. If you want to know what these look like check photo 2 in this article (http://www.classic-computers.org.nz/blog/2009-04-13-mac-classic-2-dishwasher-fix.htm).

October 20th, 2011, 04:27 AM
Ran through dishwasher. Put in 275 degree F oven for 10 miniutes. No help. May need cap replacement therapy.

October 27th, 2011, 09:38 AM
For any Mac manufactured in the mid-90's or earlier, it's safe to assume that a recap will be necessary. I just had to recap my 1993 Color Classic because most of the old electrolytic caps had leaked. I replaced them with solid tantalum caps and all is well - it only takes basic soldering skills and a few dollars worth of replacement parts from DigiKey. This web site (http://68kmla.org/wiki/Capacitor_Replacement) offers a great explanation of the process. Recapping is a skill that any vintage computer collector will need eventually (also, see RetroBrite, great for restoring yellowed plastics).

October 28th, 2011, 03:47 AM
I am very familiar with recapping. I work on vintage electronics mostly Tube equipment and 99% of the time the filter and coupling caps need to be replaced.

I did try to recap the Mac Classic board to no avail. I think I basically cooked it when I had it in the oven. May have been to long. Oh well still have the SE/30!