I too have the the problem. I have tested the monitor and cable on another PC, it worked. I have tried another working monitor on the Medion PC and it did not work, i got the same error on a blue rectangle box, "No Signal". Now here i the odd one. I have just powered off and on and this time i got the single bleep as it started up. This time it went throught boot up, F11 screen etc and launched windows 10. Is obviously and intermittant fault, but how do i find out what?
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