Gigabyte mb failing to boot + waiting modus issues

bihweb

Honorable
Sep 28, 2012
10
0
10,520
Hi all
In last few weks I have been expiriencing some strange issues with my pc. I come here seeking advice on this really anoyying problem.
problem description :
It started very innocent with my pc going to waiting mode ( not power down sleep mode but the one that comes after screen saver has been running on for some while )
Usualy a mouse or keyboard movement was enough to bring monitor picture back on but this started as a few occasional blinking on monitor where monitor logo (BENQ) came on during this period. In the begining it lasted at max 10 seconds.
this got worse as the time progresssed and after a month it ended up at waiting for monitor to show the picture for 20 minutes or more.
As of today PC is completely unable to show any picture evn I have been waiting for at least 5 hours just to see if it will eventually come back.
The stange part of this is that once picture shown pc works perfect. before it went totaly dead I tried following steps :
I changed monitor with 2 other monitors at that didnt help.
Since my graphic card ( Gainward gtx 650 2GB ddr5 ) has dvi slots i tryed all 3 monitors on each slot wihout success.
I changed dvi cable and tried the same with no help.
Then I changed graphic card to gainward gt 630 which has both dvi and vga output and tried both With 3 different cables on 3 different monitors With no help.I also tried one zotac graphic card With same outcome.
At this time could rule out graphic card or monitor causing this issue.
Then I opened pc cover and tried tosee if memory sticks were causing this. I did one by one test, replaced them With 2 sets of brand new similar sticks without result.
I then went step by step removing all cabling from dvd, hdds one by one all together still no Luck.

While I was in start stage of this problem even powering up pc caused blinking and one out of 5 times I had to reboot to get proper picture
. My PC has this possibiity that if U press Power Down button it behaves the same way as if you did start-->shut Down using Windows enviroment.
IN OTHER WORDS : Windows is running in the background and U can see thatcpu led is blinking faster when U apply some actions to Windows.
Then I went after poer supply after Reading some posts and changed my lian li 650W to another less powerfull but well known type With the same result.
FINALLY I cmosed my GIGABYTE EX58 UD3R MAINBOARD and after removed and put back battery. I cleaned all fans of dirt rechecked all wireing and at this point I am stucked in a way that I dont know what else to try to find out what is causing this issue. My Windows is original ad its 7x64 ultimate edition all updated to the latest.

Funny thing about this is that everything is working fine in the background but I jt cant see it. I placed this in motherboard section without really knowing if that is the issue since i previously expirienced that 1 out of 10 times boot will just stuck on this " 50.000 hours guaranty by gigabyte Picture which is shown on boot and is stucked there . While that is happening by CPU led is constaltly on.
And yes do I have to say that I also swaped my cpu With another one to see if there is some strange Connection between that behaviour and my problems.

Sorry for misplaced Capital letters as this keyboard am using is doing this automatically ( NOT THE ON ON PROBLEMATIC pc )

So gents I m preatty much desperate here. I followed the tutorial that was suggested in this forum about reproducing sound beeps and such but every single part is kinda working as it should. It is just not showing on my PC....

PLEASE HELP