Hello, I have an emachine T6212. Windows XP. My screen started to vibrate and I thought that I need to upgrade my onboard video card. I bought a new video card and insert it into the connector. But I forgot that my monitor was still plugged to my onboard video card. I turned the machine on, and it was just like before my screen was vibrating. I realized that I forgot to plug my keyboard and I turned off the machine to plug the keyboard and restart again. That was the end of it. My monitor always showed that "No signal" and it is black. I cannot see anything. Only time I was able to see was when my monitor was plugged to my onboard(old) video card, I pressed R key when booting and, recovery option showed to ask me if I want to format the machine. I would really appreciate if anyone can help me with this problem.
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Did you try a different monitor?
Yes, I did and monitor is fine. I think it is the video card. Thanks for your suggestion.