Computer will not boot after changing RAM.

Question

Hi All,
I have had some BSOD since I upgraded my system earlier in the year. So yesterday I decieded to try and test if the problem was one of the RAM blocks, by only using 1 X 4 MB ram at the time, and then after a BSOD I would change it to another RAM and test again.
Anyway, I started by taking all 4 X 4 MB ram's out, and then only insert 1 in Dimm 4(first found out later that I should have put it in Dimm 1). This worked fine, and computer rebooted, and I used it all yesterday. Then just before I went to bed I got another BSOD, so I powered the computer off, and then this morning before turning on the computer, I replaced the RAM with one of the other 4 MB ram, to continue the testing of my ram blocks.
But now my computer just wont boot anymore! I tried putting all RAM blocks back, putting 2 of them in, 1 at the time, and every combination I can think off, but it just wont start anymore.
When I power on the computer, it does start the fans, and the 2 blue light in the motherboard is on, but nothing comes on the computer screens, and no beeps or anything at all. It just stands there with all the fans running without booting bios.
I tried resetting the CMos, and removing the battery like shown in your guide on here, but it made no difference. I also tried to remove ALL ram blocks, just too see if it then would give me any beeps, but exact same thing happens. So I supect that the reason it does not start  booting, is because it thinks that there is no RAM in the motherboard ???
I really hope someone can help me out here, since I'm close to giving up, and I'm out of ideas. Everything worked fine last night, but after switching the RAM block, it just wont boot anymore no matter what ram I put in it.
My system is:
MB: Z68A-GD80 (B3)
CPU: Intel Core-I7 2600K
RAM: 2 X 4 MB Corsair Vengence 1600 Mhz & 2 X Kingston Hyper-X Genesis 1600 mhz
GFX: HD 4870
Monitors: 2 X Asus vW246H
Please help! thanks in advance!

Answer 1

Quote from: Froggy Gremlin on 31-August-12, 18:25:21
This is almost always a recipe for failure and the most likely cause of the BSOD's. Recommend to pick one kit or the other to use, or better yet if 16GB is wanted, purchase a 4X4GB kit.
Check to see if the EPS/ATX 8-pin CPU power connection is secure. The PSU is not specified in your component list. It is possible it has gone bad. Test with only one RAM stick in the primary DIMM slot. I have the most trust in the Corsair brand.
Prior to the test, remove the PSU power cord, remove the battery for awhile, clear CMOS.
Hi, thanks for your reply.
I have been running with those different ram blocks for a long time, and the 2nd set I actually got after the BSOD's started to test the ram. The BSOD is very likely to be because of a bad Win 7 installation anyway, since I cloned my old HDD to a new SSD, and that is apperantly not a good way to go, so the lets just forget about the BSOD for now - that aint my main problem right now..
I did what you surgested above, eventhough I done it before. I now have just 1 corsair ram in DIMM 1.
Removed powercord, then I cleared the CMOS again by pressing the clear cmos botton at the back with a screwdriver for 10 secs. Then I removed the battery for 10+ secs as well.
Still does not seem to boot into bios. Fans running, and light on MB, so powersupply must be fine as well. Seems unlikely that it should just die overnight anyway.. Powersuppy is a Corsair HX 750.
CPU power conector is fine. I really haven't done anything except switching that RAM block this morning. Last night when I powered the computer down, everything worked fine.
To be sure that its not because my GFX card should have gone bad overnight, I tried with another GFX card, but still nothing comes on the screens when it should be booting up.
If the none of the RAM was working, or it does not detect any ram in the motherboard, shouldn't it atleast be giving some sort of error beeps ?? What is so frustrating is, that I get NO errors or sound or anything.. I just a black screen, and a computer with atleats all fans running..