Computer turns on but doesn't boot or display image.

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9 Aug 2007
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The problem started back in December when my computer suddenly turned itself off. When I turned it back on again no image would be displayed. My computer had been working for over a year and a half but there seemed to be an odd loud buzz which would happen from time to time and my computer would freeze or blue screen error. But this seemed to go away after I replaced my cpu heatsink when I found my cpu was running at quite a high tempreture.

Currently my motherboard powers up as does my graphics card, case fans and cpu fan but nothing seems to be displayed. In my attempts to diagnose my problem I firstly tried my monitor and cable on a different computer and it worked fine, so the cable and monitor wasn't faulty. I then tried a different graphics card from another computer, this did not work. I have tried ram from another working computer and this had no effect. I then tried a different PSU and still there was no change. I then tried booting my system outside of my case, to see if the case was the problem, but still nothing happened. I then came to the conclousion that it would probably be the motherboard so I bought a new one and to my dissapointment the same problem persists. So I then thought it had to be the cpu so I RMA'd my cpu with intel and just received it back but after putting the new cpu in nothing has changed.

My system is:

Intel Core i7 920 D0 Stepping (SLBEJ) 2.66Ghz (Nehalem) (Socket LGA1366)
Asus X58 Sabertooth TUF Intel X58 (Socket 1366) DDR3 Motherboard
Asus ATI Radeon HD 4890 1GB GDDR5
Patriot Viper 6GB (3x2GB) DDR3 PC3-12800 (1600MHz) Low Latency Tri-Channel (PVT36G1600LLK)
OCZ ModXStream Pro 700w Silent SLI Ready ATX2 Modular Power Supply
LG GGC-H20L Blu-Ray Reader & HD-DVD ROM Serial ATA Drive
Western Digital Caviar Black 500GB SATA-II 32MB Cache
Titan TTC-NK85TZ Fenrir CPU Cooler (Socket 754/939/940/AM2/LGA775/LGA1366)

I'm totally out of ideas now and I'm at a loss of what to try as I have basically bought a new system.

The psu I tried was not as powerfull as my current one so could this be a problem with the psu?

I'm on the verge of taking it to a technician but I would rather try and save myself the money, so if anyone has any ideas it would be really appreciated, cheers
 
I couldnt get mine booted with an msi board as I couldnt seat the gfx card properly. Everything would spin up but just no boot.

Have you tried the other graphics card in the new motherboard out of the case. Then if that doesnt work swap over the psu while still out of the case. Just swap things around to find the culprit.
 
Yeah was one of the first things I tried before replacing the motherboard. Is it possible intel sent me back a defective cpu when I RMA'd it?
 
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