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Apple Color RGB Monitor
- Thread starter dcr
- Start date
Again, a crystal ball wont work here. Need to troubleshoot the failure.
Crank the brightness and contrast and let it warm up for a while. See if you have a picture then. If so it's probably an old tube.
I had one in that situatuon (thought no picture but it was just really weak). I recapped and it only helped marginally. Likely mine is just a high hour tube.
I had one in that situatuon (thought no picture but it was just really weak). I recapped and it only helped marginally. Likely mine is just a high hour tube.
No problem... Good luck!
Having done a fair amount of arcade repair I normally start with a recap, let the tube run for a couple hours, then adjust the flyback and focus etc. There is a sub contrast on the neck board as well as gains and cutoffs for the colors. Full cap kits and schematics are available if you search for them.
Having done a fair amount of arcade repair I normally start with a recap, let the tube run for a couple hours, then adjust the flyback and focus etc. There is a sub contrast on the neck board as well as gains and cutoffs for the colors. Full cap kits and schematics are available if you search for them.
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Thanks. I did find the schematic and capacitor kit. So far, I've not been able to find the Apple Service Source manual for it. I think I've found every one but this one.
I've got it hooked up now and, so far, I'm classifying it as "mostly dead." It's only been warming up for maybe ten to fifteen minutes, but there's no sign of any kind of image or anything. I can feel the static field around the CRT, but it's very, very weak and nothing like the field around the working monitor. Additionally, the green LED power indicator on the front does not light up at all. It would appear, by the weak static field, that the CRT is getting some power, but the LED is either burned out or not getting any power. I turned off all the lights in the room and closed the door so it was fairly reasonably dark and there's no indication of anything happening with the display or the LED indicator.
I've got it hooked up now and, so far, I'm classifying it as "mostly dead." It's only been warming up for maybe ten to fifteen minutes, but there's no sign of any kind of image or anything. I can feel the static field around the CRT, but it's very, very weak and nothing like the field around the working monitor. Additionally, the green LED power indicator on the front does not light up at all. It would appear, by the weak static field, that the CRT is getting some power, but the LED is either burned out or not getting any power. I turned off all the lights in the room and closed the door so it was fairly reasonably dark and there's no indication of anything happening with the display or the LED indicator.
The top rear of the case is getting warm.
It looks like there might be a very, very faint snow-static image on the screen, more noticeable around the edges of what I would imagine to be the display area on the CRT. But the odd thing is that I cannot see that at all with the room lights off.
It looks like there might be a very, very faint snow-static image on the screen, more noticeable around the edges of what I would imagine to be the display area on the CRT. But the odd thing is that I cannot see that at all with the room lights off.
So it's been almost an hour now and the green LED indicator now lights up. It's not dim; it's what I would call normal brightness. That is, it is just as bright as the green LED indicator on the Apple IIGS itself.
I turned the display off and on and the LED comes back on right away. Also, the display shows horizontal lines in the center when turning it off, like an old television set would when you turned it off. Still nothing displaying on the screen but perhaps there are signs of life after all.
I turned the display off and on and the LED comes back on right away. Also, the display shows horizontal lines in the center when turning it off, like an old television set would when you turned it off. Still nothing displaying on the screen but perhaps there are signs of life after all.
if its taking forever to come alive, its time for a recap. Its a high hour monitor.
I've bookmarked the site I found with a capacitor kit. It'll be added to my collection of items that need recapping.
For the week so far, one out of three monitors is in working condition, though I haven't kept the one working monitor on for an extended period to see if it stays on without issues.
For the week so far, one out of three monitors is in working condition, though I haven't kept the one working monitor on for an extended period to see if it stays on without issues.
Could you share that site you found with a cap kit. I have an Apple Color RGB monitor that I'm considering re-capping.
