willmurray461
Experienced Member
A long while ago I got an IBM 5154 in very good condition (it was not cheap though) to go with my IBM 5162. I was very pleased with the setup but one thing kept bothering me. The monitor had this green tint to it when you first turned it on, but it went away as you kept the machine running. I assumed this was the fault of old electrolytic capacitors, and since I wanted to try out my new desoldering gun, I decided to replace all of them. However, when I replaced all of them, it still had some problems. The green tint was gone. However, the display was a bit shaky and looked like it was vibrating ever so slightly. Sometimes it would pulse in and out, as if the display got slightly bigger and slightly smaller. Every so often I would hear popping noises, but no smoke or hissing so I wasn't sure if it was a capacitor bursting or not. Eventually there was a popping noise accompanied by the entire display turning solid green. At that point, I just set the monitor aside for later. Eventually, when I came back to it, it wouldn't even turn on. The power indicator light would come on, but there was no white raster and no video signal. It still makes the high pitched noises when syncing to the signal, but displays no picture. I'm now feeling like I replaced one of the capacitors with one of the wrong value. I made sure to replace all of the with identical replacements, except for two which were rated for 40v. I couldn't find ones for 40v so I replaced them with 50v ones. I checked all of the big turquoise resistors and none of them were shorted. I was wondering if anyone had a list (or could make one) of all of the values of the electrolytic caps of the 5154 so I could double check that I replaced all of the old ones correctly. If anyone has any insight as to what is happening, please feel free to share with me.