maelstrm
Experienced Member
Hello, Federation!
I recently purchased an original IBM CGA card. And, well, it has issues.
The display is "distorted". In that, when the machine boots, what should be white text on black has lines of blue mixed in (where only white pixels should be). What's weird is that, if I take a photo, it looks completely normal.
I'm testing this on a 5160 board and a 5153 monitor. The same issue occurs on a modern composite TV signal. I've checked the 5160 motherboard jumpers, and all settings are correct. The issue occurs in either 40x25 or 80x25 mode. I tried adjusting the composite "sweeper" (variable cap?), but this made no difference.
I did notice that one of the tantalum capacitors is swollen (C4), such that the brown coating is torn and a black sphere is "peeking" out. But it doesn't look charred or "burned". Just swollen. This card has the 3-legged C8 capacitor, which looks normal.
The left side of the card has this, which I guess is the model number: YB 110 6133807 01
The value of the damaged capacitor is 106 | 16K.
Any thoughts? I'm not totally averse to soldering some new components. But if its an IC, I may not be able to source it. :/
I recently purchased an original IBM CGA card. And, well, it has issues.
The display is "distorted". In that, when the machine boots, what should be white text on black has lines of blue mixed in (where only white pixels should be). What's weird is that, if I take a photo, it looks completely normal.
I'm testing this on a 5160 board and a 5153 monitor. The same issue occurs on a modern composite TV signal. I've checked the 5160 motherboard jumpers, and all settings are correct. The issue occurs in either 40x25 or 80x25 mode. I tried adjusting the composite "sweeper" (variable cap?), but this made no difference.
I did notice that one of the tantalum capacitors is swollen (C4), such that the brown coating is torn and a black sphere is "peeking" out. But it doesn't look charred or "burned". Just swollen. This card has the 3-legged C8 capacitor, which looks normal.
The left side of the card has this, which I guess is the model number: YB 110 6133807 01
The value of the damaged capacitor is 106 | 16K.
Any thoughts? I'm not totally averse to soldering some new components. But if its an IC, I may not be able to source it. :/