My monitor will blink one time every once in awhile likes it's refreshing. What's wrong?

Going on the information that you have provided, which isn't very much, I don't think that is at all related to Windows 98. It is a hardware fault. I'm guessing that you have a problem with a connection somewhere. It could be something as simple as a loose power cable (the first thing I would check). Then I would check the cable to the video card. Loose connections can also occur inside the monitor. This is the realm of a qualified service technician or possibly an excuse to upgrade.

With some TV repair experience my hunch is with Rimfire's last para. Now this might seem absurd but you can sometimes prove things like this: Wriggle leads around, especially near their ends (wear out in these areas is common). This might also throw up connector problems, so you need to use some judgement. A few "controlled" slaps on the monitor using the palm of your hand might prove something too - go easy with this. If you get the "blink" when doing any of this then you might be well on the way to locating where the fault lies. Go more gently when if you get a noticeable reaction, or you won't prove a thing. If something shows you will obviously need to take some appropriate action. If none of this proves anything then you are probably stuck until either the fault becomes more serious and fails permanently or more regularly, or goes away. Intermittent problems can be a devil of a job to find. It can often be easier when there is some complete permanent failure (at least you will know whether you've fixed problem or not when you try replacements). Derek.W

This evening monitor didn't work. No display. Switch monitor same thing. Remove video card and install a card I had laying around and monitor came on. Switch back monitor and no display. Switch monitor again and it's working. So monitor and video card went out at the same time. What are the chances of that happening.

Just to be sure, I'd put the 'failed' video card back in and try it. It is possible that it was not properly seated. If the card works, retry the monitor.

Yep, oxide on monitor card edge connectors is a good possibility. Often pulling card in and out a few times can clear oxide. Derek.W