I recently did an upgrade of my PC and replaced the CPU and video card; I later replaced the Power Supply and then the motherboard was fried so I had to replace that. I finally got all the components to work and powered it on. I previously had an NVIDIA card (GeForce 9500GT) and the new card is an ATI (Sapphire Radeon HD 7850) so when it powered on I installed the ATI drivers and uninstalled the NVIDIA drivers. This lasted about 30 minutes until suddenly my monitor's screen went black, the power light turned yellow and I got "No Signal".
Now, I cannot get any signal to the monitor with my brand new gfx card. My old card works. Specs are:
CPU: AMD Phenom II X4 965 Black
Motherboard: ASUS M5A97 R2.0
Video Card: Sapphire Radeon HD 7850 (new), NVIDIA GeForce 9500GT (old)
Power Supply: Thermaltake TR2 700W
I just bought the graphics card around a month ago. What strikes me as odd is that it turned on and worked fine for 30 minutes, and then just went, mysteriously after I uninstalled the old NVIDIA graphics card drivers (however reinstalling them didn't fix the problem).
Since it's a bit confusing with the chain of events, here is the timeline:
Buy new CPU and Gfx Card from Newegg
Try to install gfx card and CPU; get "No Signal". Discover that I need more than a 300W power supply. Order a 600W power supply.
Try (and fail) to connect power supply. Bring PC to a local repair guy to hook up and get to POST.
Local repair guy says motherboard is fried (he could not get it to POST), bought new motherboard (the ASUS).
Local guy still can't get it to POST.
One month later, local guy says PSU is bad (this being the 600W that I had just bought); get computer back from local guy.
Find out I have a Tiger Direct store ~25 minutes away.
Go to Tiger Direct, pick out new power supply (700W), get Tiger Direct to install new PSU and make sure the PC boots.
Tiger Direct says they could get the PC to boot to windows successfully, but a stick of RAM was faulty so I bought a new 4GB stick of ram (total of 6GB now).
Bring PC home; it boots up. I install the new Radeon drivers and uninstall the NVIDIA drivers. While browsing the net (~30 minutes after hooking PC up), monitor suddenly goes black and I get "No Signal"; I do a hard shutdown of the computer and will only get "No Signal" to the monitor.
Trying the old graphics card, everything works fine. Zero problems other than using a poor graphics card
The PSU and motherboard are brand new, motherboard being around 20 days old and the PSU being bought as of last Sunday. The CPU and Gfx Card I've had for almost two months now and have been trying unsuccessfully to get them to work since then. As of right now the new CPu works fine but I am using the old graphics card.