Early 2000s. VGA CRTs are still the kings in the world of personal computers. This is the greatest Era of PC CRTs in my opinion BECAUSE LCD monitors where creeping in. They where on the horizon and the idea of a thing little screen and more desk space was very appealing to most corporate consumers as well as in the personal consumer space. Soooo what did CRT manufacturers do in this era? Some awesome stuff! It’s like the muscle cars in the EV era! It makes me wish I could have seen what CRT technology could have turned into had it progressed into the 2020s. Obviously it’s all a nostalgic dream but I can only imagine how great that would be. This is where the ViewSonic A90 lives. She isn’t the greatest Trinitron killer or some professional graphic design CRT… she is just a stock 5.0 in the world of EVs, just a really honest 19 inch shadow mask monitor built at a time when companies had this stuff figured out down to muscle memory. This is what a “normal” good CRT looked like right before everything went flat and cheap. There’s this idea that never dies that Trinitron equals best and everything else is just…. Meh. I get it, I really do. I love my Trinitrons. The brightness, the punch, the way they snap edges into focus like a razor blade. But a good shadow mask VGA monitor is playing a completely different game. It’s trying to look right when you’re sitting a foot and a half away actually using the thing for long hours at work or…. Writing a webpage about it. The A90 is one of those monitors where white backgrounds don’t glow at you, they just sit there like paper. Text doesn’t look like it’s being forced onto the screen, it looks printed. There’s no grill lines, no weird edge bite, just a soft, blended image that your eyes settle into instead of fighting. It’s not better than a Trinitron, it’s just a different kind of “correct”, and if you’ve only ever chased sharpness you miss that entirely. The soft glow of a quality shadow mask is an experience unlike any flat panel garbage you can purchase today… in 2026. Something about that 4:3 aspect ratio with little to no wasted space writing this up in a word document in a dark room that just… makes me so happy. It’s simple, and perfect. Dragging home this monitor was like any other beige beast I’ve brought home. Dirty, heavy, awkward, and a slight glare from my fiancé as it comes through the front door. Nothing about it screams special until you actually power it on. This A90 fought me at first. The image was off, colors were doing weird things, and it had that gross interference look that makes you immediately think the tube is cooked…. this is where a lot of people would have written it off. But it wasn’t the monitor. It was everything around it. Bad grounding, messy cables, junk power, the usual modern setup sins. After cleaning up my goofy setup by rerouting everything, I gave it proper power, and suddenly the whole personality of the monitor snapped into place. That first clean image after fixing the interference was one of those moments where you realize just what we lost when we gave up CRTs. The tube was fine the entire time. It just needed a clean signal like these things were designed for. Once it’s actually dialed in, the A90 lands exactly where it should. Geometry is solid for what it is (no wild bowing or corner collapse). Brightness is strong without feeling harsh, and the tube doesn’t feel tired. Colors lean natural instead of oversaturated. You don’t get that insane neon Trinitron pop, but you do get something far more believable. Skin tones look right, whites don’t blind you, and gradients blend instead of… stepping up. Sharpness is where people get confused. It’s not razor sharp, and that’s the point. It blends just enough that text and UI elements feel cohesive instead of etched. This monitor makes you feel that it’s about a smooth, continuous image that feels stable. No smearing, no weird processing, just raw, immediate response. Something about seeing the phosphor decay when you close a bright white text document it’s just so neat on this tube. I chose this monitor as my daily. It’s a bit of a trial run but I’m giving it the best chance possible using a quality Startech HDMI to VGA adapter. It’s not perfect. It doesn’t have that insane edge definition some people chase. It’s not going to replace a high end aperture grille if that’s what the internet has convinced you that you MUST HAVE. And like a lot of these, if your setup is noisy or your cables suck, it will absolutely show you that in the worst way possible. This is not a forgiving monitor. You either feed it right or it looks like garbage…. But when everything is right, this thing sits in that sweet spot of mid tier that people overlook. Not rare, not hyped, but genuinely good. The kind of monitor you could daily without thinking about it, which is exactly what it was built for. It’s not trying to be a collector piece, and ironically that’s what makes it interesting now. So where does it land? Solid mid tier, leaning into sleeper territory if you actually understand what it’s doing. Not a budget piece of junk, not a crown jewel, just a properly built, honest CRT that delivers when you respect it. Oh and 18 inches should NOT be ignored. That’s the main reason this tube got me excited. Should you buy one? Yeah, if you want a real VGA experience and you’re tired of everything looking overly sharp and artificial. If you’re chasing that Trinitron punch, this isn’t your monitor. But if you want something that makes a white webpage look like paper and lets your eyes relax instead of constantly focusing, this is exactly that. At the end of the day, this is one of those monitors that doesn’t impress you in five seconds. It wins you over after an hour when you realize you stopped thinking about it completely. And honestly, that might be the whole point. Stop chasing something that doesn’t exist and just enjoy being a weirdo who loves this old tech.
Brand:
ViewSonic
Manufacturer:
ViewSonic Corporation
Model:
A90
Series:
A Series
Viewable Size:
18″
Input Signals:
RGB Analog (0.714Vp-p, 75Ω), H/V Sync, Composite Sync, Sync-on-Green
See common issues and potential solutions at the bottom of this page!
Interference-induced image instability shows up as waviness, shifting colors, ghosting, or a picture that looks completely wrong even though the tube itself is healthy. The diagnosis is almost always a dirty analog signal path rather than a failing monitor. These A-series ViewSonics are sensitive to grounding quality, cable shielding, and nearby EMI sources. The common fix is to clean up the entire chain by using a proper VGA source or high-quality DAC, replacing or shortening cables, physically separating power and signal lines, removing noisy peripherals like cheap speakers or amplifiers, and ensuring the monitor and source share a stable ground.
Perceived softness compared to aperture grille displays is often mistaken for a defect. The diagnosis is simply the inherent behavior of a shadow mask tube with a 0.23 mm pitch, which blends pixels slightly instead of producing razor-sharp edges. The fix is not repair but proper configuration and expectation. Running appropriate resolutions and refresh rates, dialing in contrast and focus, and viewing at a normal desk distance brings out the intended “paper-like” image instead of chasing unnatural sharpness.
Geometry drift over time can present as slight changes in image width, height, or edge shape, sometimes varying as the monitor warms up. The diagnosis is normal analog drift from component aging and thermal behavior rather than a specific fault. The fix is to correct it through the on-screen geometry controls, allow proper warm-up before use, and in more noticeable cases check for power supply stability or aging capacitors.
Edge convergence imperfections Edge convergence imperfections appear as minor color separation near the corners while the center of the screen remains clean. The diagnosis is typical alignment tolerance for a 19 inch shadow mask CRT and not a sign of failure unless severe. The fix is limited to available convergence or geometry adjustments, but in most cases it is considered normal behavior for the class.
Brightness reduction with age Brightness reduction over time shows up as a dimmer image requiring higher brightness or contrast settings. The diagnosis is gradual cathode wear within the tube itself. The common fix is to compensate with calibration adjustments if the tube is still usable, verify the issue is not caused by signal or power problems, and recognize that significant dimming indicates natural end-of-life rather than something easily repairable.
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