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They weren't that uncommon. It was basically a 486 that was pin compatible with the 386SX, which itself was a glorified 286. There...

Most of the 5154s I've worked on have that capacitor tacked on like that.

You should scrape away as much of that brown/black glue on the board as you can. It's corrosive, and slightly conductive.

Yes, monitors from that era always under scan by a fair amount.

Wonderful! Looks like it could just use a degauss, and maybe a focus adjustment, but great to see a success. It's hard to tell if...

I think you're over analyzing this. The fact that you have high voltage means the HOT is doing its job. There isn't much that could...

I know you can make the screen light up green, but is there any actual green video in the picture? It sounds like there isn't...

Since the horizontal deflection is driven by the same circuit that drives the flyback, you can be sure most of it is working since you...

Don't get too caught up on making the cathode voltages match the schematic exactly. They will vary slightly depending on the condition...

It's not a critical adjustment. Just turn it up and see if you get anything on the screen. If there's no difference, put it back where...

Have you tried turning up the G2? As said before, with only about 100v on the G2, I would expect to see no picture.

It can be a huge problem. One check I like to do is to probe various spots on the board with an ohm meter. Any reading at all means...

There's no need to discharge the CRT unless you need to disconnect the HV cable from the CRT bell. Most monitors do self discharge due...

Based on that, you can rule out any kind of major fault like a shorted power transistor, or bad power supply driver IC. Depending on...

I think people are often too critical of the 5154. I've worked on about 10 of them in recent years, and all but one were still in...