I have this CRT monitor, a Sony E450 made in 2003, that has the issue of a quite bad contrast and washed out picture after powering it on, it takes roughly 15 or 20 minutes to improve considerably but even then black levels still aren't quite ideal. This is with brightness dialed in via test pattern and contrast at 100% to get acceptable light output levels.
Since it does improve after a warm up time is there a good chance of this being caused by capacitors and if so, what part to recap first? As far as I'm aware the vertical deflection area is where caps are stressed the most but I'm not sure if that could affect contrast as well. I haven't opened it up so far so I don't know the full cap selection yet but from the outside I see a few caps in what looks to be the power area, a Nichicon LK 450uF/470V and some smaller Rubycon YXA.
Since it does improve after a warm up time is there a good chance of this being caused by capacitors and if so, what part to recap first? As far as I'm aware the vertical deflection area is where caps are stressed the most but I'm not sure if that could affect contrast as well. I haven't opened it up so far so I don't know the full cap selection yet but from the outside I see a few caps in what looks to be the power area, a Nichicon LK 450uF/470V and some smaller Rubycon YXA.
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