Black screen, no POST, fast fans after overclock

michaelday

Reputable
Oct 9, 2014
2
0
4,510
Hi,

I have a pretty newly built machine. This is it's story.

I bought the case, motherboard (AMD 970 Gaming AM3+), PSU, and hard drive that I wanted. To get the computer up and running before I could afford the rest of the parts, I got a cheap CPU (Amd Sempron 145) and ram (a slow 2GB stick). I put it all together and it worked fine, if slow. I overclocked the CPU from 2.8 to 3.2 in the BIOS.

Yesterday I got better CPU (AMD FX 8350) and Ram (Corsair Vengeance Pro) and installed them. The computer gave me a black screen for a while. After turning it on, letting it run, and turning it off again a few times, it worked. I got a message about the old overclocking failing, pressed F2 to set it to default settings, and it loaded fine.

Today I noticed that the RAM was 1333Mhz. I did some research and found out that RAM speeds need to bet set in the BIOS, something I didn't previously know, and started trying to fix that. I set the RAM to 2133 in the BIOS (highest supported by my motherboard). It said 2133 in the bios, but when I loaded into Windows, it still said 1333. I found out the my CPU might only support 1866, so I tried setting that in the BIOS. The BIOS reported 1866, and Windows still reported 1333. I don't know why this happened or if it matters.

I left it alone for a while and did other things. I turned on OC Genie in the BIOS. The CPU went from 4.0 to 4.2. I turned OC Genie off in the bios and rebooted into Windows. I loaded MSI's Command Center program and looked at the settings there. I increased the clock speed slowly (using the software) until the CPU was running at 4.5. The CPU temperature never increased. A few minutes later (just web browsing), I got a BSOD.

Before the BSOD, I was looking in my motherboard's manual and saw that RAM should be installed in slots 2 and 4. Mine were installed in slots 1 and 3, so as long as the machine was off I opened it up and moved the RAM to 1 and 3.

The computer never started again.

I have no idea what caused it or how to fix it. I tried resetting the CMOS. I tried putting the RAM back in slots 1 and 3 like before. I tried using only 1 stick of RAM. I tried the old RAM. I tried the old RAM and the AMD Sempron. I reset the CMOS using the jumpers after every hardware change, just in case. I also tried resetting the CMOS by removing the battery. I went through the checklist that I saw posted on some of these forums from people with similar situations. I tried removing the RAM entirely to see if I got beeps. No beeps. But then, I don't think there were ever any beeps when it was working properly, either.

When I press the power button, all the fans and lights turn on, but nothing goes out to the display. Every few seconds, the fans will increase speed until they seem to be spinning at full speed, after which I hold down the power button to turn it off again.

Here are the exact parts in the machine right now:
Thermaltake TR2 TR-500 500W ATX12V v2.3 SLI CrossFire Power Supply
AMD FX-8350 Black Edition Vishera 8-Core 4.0GHz (4.2GHz Turbo) Socket AM3+ 125W Desktop Processor FD8350FRHKBOX
MSI 970 Gaming AM3+ AMD 970 SATA 6Gb/s USB 3.0 ATX AMD Motherboard
CORSAIR Vengeance Pro 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 2400 (PC3 19200) Desktop Memory Model CMY16GX3M2A2400C11A

I don't know how to diagnose what problem it is past this point to know if something is friend, configured badly, or needs to be returned, or what part is the problem. Any help would be appreciated.