Why might my OAK OTI-037c not start properly at boot? \ VOGONS

Why might my OAK OTI-037c not start properly at boot?

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First post, by Kahenraz

Posted on 2024-03-14, 04:57

Kahenraz Online

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I'm having a problem this OAK OTI-037c that I bought. For some reason, it does not always display a picture when the system turns on. The card is still detected, and I get a positive POST beep, but there is no display. Power cycling will usually make it work, typically on the second try.

I don't see any dried out electrolytic capacitors to replace. What would be the problem?

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Reply 1 of 4, by dominusprog

Posted on 2024-03-14, 15:37

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Are you using an ISA riser? And what about the DIP switches on the front, did you set them correctly?

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Reply 2 of 4, by rasz_pl

Posted on 2024-03-14, 17:24

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Quartz resonators might be damaged/tired. I would alo try unpluggin/plugging back in instead of restarting.

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Reply 3 of 4, by bakemono

Posted on 2024-03-15, 14:16

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Is it a monitor issue? Does it also happen on CRT? (looks like an LCD in your photo)

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Reply 4 of 4, by Kahenraz

Posted on 2024-03-15, 16:04

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I only have LCDs. I don't have this issue with any of my other known-working cards.

Although I have experienced this before with both sound and video cards, it's always due to the card being very old and not having been powered on for some time. I believe that this is due to capacitor aging, and after a few power cycles the cards become reliable. In one extreme case where I thought a card was dead, I left it in the system while powered on for some time while thinking. After one last attempt after that, it started working and was stable after that.

The difference with this card is that there are only solid state ceramic and tantalum capacitors. There are no electrolytic capacitors at all.

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