have to 1st boot up in safe mode

hey guys im using win 7 the problem is wired when ever i try to start my computer after i shut it down for couple of hours it will not start will just show a black screen ( there is no power from the gfx to monitor ) after i start the pc once in safe mode and then restart it then it works normally plz tell me what could be wrong ??
Answer #1
Try re-seating your graphic card, RAM
Answer #2
Try re-seating your graphic card, RAM
so should i remove then and reinsert them or try to see if they are not loose coz i have already done that yet this problem is still there and its just on happening with 1 hdd i have 2 it happens with both
Answer #3
It could likely be a sick PSU that does not have the guts to run the Video card properly until it’s warmed up..
Also look at your motherboard for bad capacitors..
https://www.google.com.au/search?q=bad+capacitors&hl=en&client=firefox-a&hs=7aD&tbo=u&rls=Palemoon:en-US:official&tbm=isch&source=univ&sa=X&ei=EnjMUJ7xDuueiAempYCgCw&ved=0CD0QsAQ&biw=1390&bih=767
Answer #4
i was just working fine a few days back the problem started when for some work i attached 160 gb hdd (internal) that is when the problem started happening and after that when the work was done i attached by 2 TB ( internal) hdd not that too is giving me the same problem