i have problem today with my monitor screen.when i start cpu everything works fine but screen dont show any signals not even The ERROR "No cable attached" or "NO SIGNAL"
it just glow monitor LED blue then orange.what is the problem? I have checked monitor on other cpu also but problem is same..
i think when monitor led green and then orange simply the reason that it did not get the signal for cpu. but in your case when you attached it to another cpu then the same problem accure. i think it's problem of bad monitor signal cable or the monitor circuit problem( in case Horizal Outupt trangister did not work).