Hi, before I start, here are my computer specs:
Motherboard: GIGABYTE GA-P55-UD3R
CPU: Intel i5-750
RAM: OCZ PC3-12800 Obsidian 4GB Dual Channel Kit
PSU: OCZ 500 Watt
Video Card: GIGABYTE GV-R455D3-512I
OS: Windows 7 64-bit
I built this system about 1.5 years ago and it hasn't had any problems until now.
What happened was about 4 weeks ago I opened up the heatsink and replaced the thermal paste on the CPU with artic silver 5 because I noticed that the CPU was running hot (windows 7 kept on running some networking file whenever idle that caused like 90% CPU consumption and I couldn't turn it off, only not be idle...temps were like 38 C to 66 C intermittently). After replacing the thermal paste, the computer ran well for 3-4 weeks. Then I turned on the computer a couple days ago and while I was browsing on the internet it just rebooted.
After it rebooted, I got a black screen on my monitor and nothing showed up.
Since then, whenever I try to boot, there is no POST, no beeps, and a black screen.
So far, this is what I have tried. I have removed/reseated the RAM, I have tested the PSU with the multimeter, I have built the system outside of the case to check for shorts, I have tried to boot the system with no RAM, no video card, I have taken off the heatsink and re-seated the CPU, and I have reset the CMOS manually. Still, all I get is no POST, no beeps, nothing.
The speaker was working up until the last known good boot a couple days ago so I don't think that the speaker is the problem.
When the computer powers up, the hard drive powers with it, the fans spin, and the lights come on in the motherboard and on the LED in the front.
One thing I did notice is that even though the CPU fan spins, it doesn't seem like it spins fast enough and the heatsink on the CPU never gets hot.
I specifically tested the CPU 8-pin 12 volt power source from the PSU.
I have filed the question with GIGABYTE but haven't received a response yet.
Maybe you guys can help me because I'm really out of ideas and disappointed
THANKS
Motherboard: GIGABYTE GA-P55-UD3R
CPU: Intel i5-750
RAM: OCZ PC3-12800 Obsidian 4GB Dual Channel Kit
PSU: OCZ 500 Watt
Video Card: GIGABYTE GV-R455D3-512I
OS: Windows 7 64-bit
I built this system about 1.5 years ago and it hasn't had any problems until now.
What happened was about 4 weeks ago I opened up the heatsink and replaced the thermal paste on the CPU with artic silver 5 because I noticed that the CPU was running hot (windows 7 kept on running some networking file whenever idle that caused like 90% CPU consumption and I couldn't turn it off, only not be idle...temps were like 38 C to 66 C intermittently). After replacing the thermal paste, the computer ran well for 3-4 weeks. Then I turned on the computer a couple days ago and while I was browsing on the internet it just rebooted.
After it rebooted, I got a black screen on my monitor and nothing showed up.
Since then, whenever I try to boot, there is no POST, no beeps, and a black screen.
So far, this is what I have tried. I have removed/reseated the RAM, I have tested the PSU with the multimeter, I have built the system outside of the case to check for shorts, I have tried to boot the system with no RAM, no video card, I have taken off the heatsink and re-seated the CPU, and I have reset the CMOS manually. Still, all I get is no POST, no beeps, nothing.
The speaker was working up until the last known good boot a couple days ago so I don't think that the speaker is the problem.
When the computer powers up, the hard drive powers with it, the fans spin, and the lights come on in the motherboard and on the LED in the front.
One thing I did notice is that even though the CPU fan spins, it doesn't seem like it spins fast enough and the heatsink on the CPU never gets hot.
I specifically tested the CPU 8-pin 12 volt power source from the PSU.
I have filed the question with GIGABYTE but haven't received a response yet.
Maybe you guys can help me because I'm really out of ideas and disappointed
THANKS