No dipslay while PC is on.

[hitesh3055]

Guys need urgent help. As my Demo reel is going on and at this precious time my pc stop working. when i turned it on it run properly but not giving display. mouse and keyboard light working properly. Even num lock is working.. but it is not giving display. while i switched it on motherboard is for 3-4 secs. and while it was runing properly it was only for less than 1 sec.
So i take my pc to service centre, but their it is running properly each time.. i took my 4 times their but all the times it is working properly at that place. Now they are saying if your keyboard is showing num lock light on and it is working properly than your pc output is going on. they asked me to change my setup. I have done that also but same result while on the same setup my friends pc i.e i3 is running properly. When i took my pc at my friends place it is working their also. Running properly. But at my house it is not giving display.


Sorry for bad English.
Please kindly suggest me something what should i do.


PC config.
i7 960 -processor
gigabyte -motherboard
650 Gx cooler master -SMPS
12 Gb G Skill - ramb
1TB Wd Green label - Hard disk
ATI sapphire 6870 - Graphi card

 

[apower101]

Change the hdmi cable, and check the monitor. ALso, this isn't a cpu issue, rather a gpu/monitor issue.

 

[hitesh3055]

I Have done all possible changes already.. Even i tried on new monitor also.. But no DISPLAY.. As i told Motherboard Beep sound is for 3-4 secs. when it was normally running it is for less than a sec..

 

[apower101]

Which gigabyte mobo is it?