ins_bscp@jhunix (Sean Christo Purcell) (02/28/89)
I've noticed lately that the screen on my mac (a 1984 512k) has been getting a little fuzzy around the edges, like it's out of focus. The center of the screen is still clear, and it's worst in the corners. Is this a sign of impending demise of the picture tube or video circuitry, or is there some quick (or at least inexpensive fix) which can prolong it's life until I can afford a MacII (a long time at the rate I'm going) -Sean
steveg@tove.umd.edu (Steve Green) (03/01/89)
There is a focus control on the mac analog board. The control is marked as r54 and can be adjusted with an ordinary flathead screw driver. Often, there is a resister that breaks which will cause the focus control to have no effect. The resister is a 1meg ohm and is marked as r9. The breakdown of these parts and the power supply in general is mainly caused from the heat generated...If you dont already have one, get a fan.
md32+@andrew.cmu.edu (Michael Joseph Darweesh) (03/02/89)
have you tried cleaning your screen thourougly??? If you're lucky, that's an easy solution... If not, I have no idea.