Chosen Solution Hello , Mac pro 2013 till yesterday night was working properly, last night I powered off everything gone normal, got powered off, next day when i turned it ON so the first message on tv through Hdmi No Signal and black screen , i powered off then restart several times but got the same result, then I realised that it’s not even connecting to the Wire keyboard because it’s not showing lights , and no fan noise at start up, but all the white lights on the back panel are lightened but no fan noise even on start up....