Hi everyone,
I thought I'd reach out to the EEVblog community for some assistance.
I'm in the process of expanding my vintage computer collection and managed to score a bunch of old Apple Macintosh hardware for $10. Absolute gold! Part of my acquisition were two Apple 'Multiple Scan 720' 17" CRT monitors. But both have identical problems.
Whilst my expertise lies in IT/Data forensics, I'm not a CRT/Television/Power Supply expert. I'll try to explain the symptoms as best as I can:
Both power up and display a signal without any problems. Overall, the picture is pretty good; Sharp, good colour, good shape, no burn-in.
ISSUE #1:The maximum brightness/contrast settings seem a bit low. I mean the image is fine, but I feel that I shouldn't have to crank the settings all the way up to achieve a normal picture.
ISSUE #2: Perhaps the more serious issue. Intermittently, the monitor has a "glitch". The image will distort for a fraction of a second and an audible "click" or "tick" can be heard. My guess is that there is an issue with the power supply.
Could anyone with some CRT expertise point me in the right direction? I'm even happy to pay someone to diagnose/fix my problem (I live in Sydney). Poking around CRT picture tubes has always made me nervous so I'm hesitant on working on it myself.
Michael.