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New build with Asus P5B WiFi-Ap mainboard; Intel duo core E6700; OCZ 500w PSU; PCI express graphics card. Corsair DDR2 XMS2 twin 1Gb 6400pro;MB lights up, fans work but no beeps and black screen

Posted on 2006-11-28
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Last Modified: 2010-04-25
Hello
I am new to this so hope I am not too far off protocol. I have just built this and all the connections seem Ok. The MB has a blue light that goes on. The fans including CPU fan all go. I read something about memory voltage and wondered about that. Tried it without memory and get a constant series of short beeps. So at least the beep works but not sure what those beeps mean except perhaps absence of memory. Any ideas?  
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Question by:rldavies
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Expert Comment

by:Callandor
ID: 18027440
Whenever you install a new cpu, reset the CMOS using the motherboard jumper or remove the CMOS battery for 10 minutes.  This will force the motherboard to default values for your cpu.

You may also need to swap the video card and the RAM, to see if they are causing the failure to boot.
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Author Comment

by:rldavies
ID: 18028558
Thanks for that. It sounds like good advice and makes me realise how little I know. I will try it when I get home from work tonight and let you know how I get on.
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Author Comment

by:rldavies
ID: 18032296
Well I tried the CMOS battery and also put in a pci graphics card but no change. Should I try another PCI express graphics card or different RAM next? Either way I will have to go and buy it.?
This time the beeps without the memory post cmos change, was one long and two short repeating.
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LVL 69

Expert Comment

by:Callandor
ID: 18033230
A PCI video card should be sufficient to see if the system will boot up.  Before buying RAM, take the motherboard out of the case and set it on a nonconducting surface, like wood or cardboard.  Sometimes, the motherboard grounds itself on a standoff or part of the case.  A bad power supply can also prevent bootup, but OCZ tends to make quality products, and if you had a second system around that had sufficient power, you could try that power supply.
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Author Comment

by:rldavies
ID: 18035419
Thanks. I had already seen your suggestion on another thread and had already tried taking the motherboard out but no joy. The power supply is Ok . have tested with meter and all acording to spec.
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Author Comment

by:rldavies
ID: 18035439
forgot to mention that I have both 4pin 12v plugs going into the 8 pin CPU power socket. I had conflicting advice from Asus and OCZ about whether it should be one or two plugs inserted.
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Accepted Solution

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Callandor earned 500 total points
ID: 18036418
See what the replacement RAM does in this situation.
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Author Comment

by:rldavies
ID: 18039151
I suppose I was trying to avoid spending lots more money on ram just to see if my current Corsair ram is reliable. Looks as though thats something I will have to do if no other avenues can be explored.
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Author Comment

by:rldavies
ID: 18040584
partial success: I have got it to boot up!! I think there must have been one permutation/combination of memory module swapping that i hadn't tried. It works with one memory module placed in A1 or A2 dimm. The other ram module does not work in latter or B1or  B2 dimm. The one that works also does not work in B1 or B2.
i.e nothing works in B1 or B2. Is there a problem with the board as well as one of the memories do you think? or is it something else. the Corsair memory  (both of them) light up in all slots in a similar way settling down to 3 green lights.
So anyway I now have access to setup , so anything i can do there to fix B! B2?
thanks for your ideas to date
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LVL 69

Expert Comment

by:Callandor
ID: 18043034
You may have two problems, if simply using either RAM module in the same slot produces different results.  You may have a bad RAM module and a bad memory slot.  What you could try is to change the RAM CAS latency manually in the BIOS so that it has the next larger value.
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Author Comment

by:rldavies
ID: 18083957
I have now returned the motrherboard for testing at Asus suggestion as it may be a bad memory slot. i will have to go quiet for a while until its returned but if it was a bad memory slot then I will return to accept Callandor. Thank you to others for helping me with this. I will need to read EE instructions to see if possible to split points betwen people
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LVL 69

Expert Comment

by:Callandor
ID: 18090877
You can split, but I'm the only one here ;-)
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Author Comment

by:rldavies
ID: 18091684
sorry that was a bit dense of me , I didnt scroll up and thought I remembered someone else at the beginning. The answer is clearly amongst your suggestions somewhere. I just think its odd for there to be possibly a fault with one ram module and two ram slots at the same time. Will get back in due course
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Author Comment

by:rldavies
ID: 18207277
Not abandoned just waiting for results as I said above. After a lot of messing about and Asus not being too helpful I discovered my corsair memory was 1 module defucnt and the other 1/2 working. replaced with crucial and now all working fine. Callander helpful in steering me through so will close and award points.
Thanks
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