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This article is from the 3b1 computers FAQ, by John B. Bunch with numerous contributions by others.

7.2. What can I do when I turn on my UNIX PC and I have no video?

The first thing you could do is check the brightness control. After you are sure that it's not that, the problem generally goes away by replacing the power supply. If you don't have a spare one, try asking on Usenet, or deal with ASCRC.

 

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pc, hardware, video, AT&T UNIX PC, PC7300, and 3B1, faq, frequently asked questions, repair, computer, card