PC Not starting and no bios beeps.

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Upgrading my mums pc. Replaced motherboard (Asus A8N-VM CSM), CPU (x2 3800), RAM (Kingston Value), PSU (650w enermax noisetaker). Set it up late last night and turned it on. Power led on mobo lights up when switching on psu then hdd, optical drives, cpu fan start when switching the case power on but then nothing. There are no beeps at all and no vga/dvi output to the monitor.
The mobo has on board graphics but i was going to try it with a pciex card when i get home today.
Has anyone got any other ideas/suggestions I can try/check?
 
Does the CPU fan continue or does the whole thing shut-down after a short-time?

Check cables and seating...
Try Post just using the bare-minimum (CPU, memory)
Build outside of the case to test for mobo shorting on case
 
delbuenno said:
Has anyone got any other ideas/suggestions I can try/check?

Dumb question but have you made sure that the case speaker is connected correctly - I've been caught by that one before :o
 
CPU fan continues running.

Have got the 24 pin and 4 pin power cables attached to mobo, cpu fan, hdd, opticals and floppy, case connectors, nothing else. Will try unplugging all unnecesary cables and try again when I get home. Will try it out of the case if that doesnt do it.

Pretty sure the speaker cable is connected properly, tried it the other way round and also tried with a spare from another case with no joy, but it was late so will re-check it later.
 
It is most likely the motherboard but don't count out the CPU or the RAM. Try moving the RAM into a different slot. Also does the new motherboard have support for your moms older processor? Try the old CPU into the new motherboard to rule out the new CPU.
 
Reset the CMOS, I have the same board- if onboard VGA is disabled you won't get a display from monitor (say using PCI-E, so disable onboard, then remove onboard but forget to enable onboard) I have the same board.
 
progress report.
CPU, PSU, RAM, monitor and gfx card all tested on another system and all fine.
Tried my x1900xtx in it with stock hsf and its fan starts up at full speed and stays at full speed (doesnt slow down like it should when the machine posts). Still no monitor output. Took all the ram out and then switched on, it beeped (one long and 2 medium) tried with one stick of ram in the A2 dimm then B2 dimm and no beeps. In the A1 or B1 dimms I get 1 short beep then 2 very short beeps . Going to recheck all jumpers are in the right positions.
Any more ideas, anything really obvious that I may have overlooked?

Edit: also resetting the CMOS didnt do jack. Even tried replacing the cmos battery. :/
 
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Tried stock AMD hsf and arctic cooler 64 on it.
hmm. the beeps mean :-
1 long, 2 short Failure in video system An error was encountered in the video BIOS ROM, or a horizontal retrace failure has been encountered.
It still does the same beep sequence with the gfx card in, I would imagine that if i could get into the bios to switch the vga priority to pciex16 card it would work ok. However as I can't guess theres nothing else I can do but send it back. :(
Cheers for your help anyway guys.
 
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AMI BIOS Beep Codes


1 Short Beep One beep is good! Everything is ok, that is if you see things on the screen. If you don't see anything, check your monitor and video card first. Is everything connected? If they seem fine, your motherboard has some bad chips on it. First reset the SIMM's and reboot. If it does the same thing, one of the memory chips on the motherboard are bad, and you most likely need to get another motherboard since these chips are soldered on.
2 Short Beeps Your computer has memory problems. First check video. If video is working, you'll see an error message. If not, you have a parity error in your first 64K of memory. First check your SIMM's. Reseat them and reboot. If this doesn't do it, the memory chips may be bad. You can try switching the first and second banks memory chips. First banks are the memory banks that your CPU finds its first 64K of base memory in. You'll need to consult your manual to see which bank is first. If all your memory tests good, you probably need to buy another motherboard.
3 Short Beeps Basically the same thing as 2 beeps. Follow that diagnosis above.
4 Short Beeps Basically the same thing as 2 beeps. Follow that diagnosis above. It could also be a bad timer
5 Short Beeps Your motherboard is complaining. Try reseating the memory and rebooting. If that doesn't help, you should consider another motherboard. You could probably get away with just replacing the CPU, but that's not too cost-effective. Its just time to upgrade!
6 Short Beeps The chip on your motherboard that controls your keyboard (A20 gate) isn't working. First try another keyboard. If it doesn't help, reseat the chip that controls the keyboard, if it isn't soldered in. If it still beeps, replace the chip if possible. Replace the motherboard if it is soldered in.
7 Short Beeps Your CPU broke overnight. Its no good. Either replace the CPU, or buy another motherboard.
8 Short Beeps Your video card isn't working. Make sure it is seated well in the bus. If it still beeps, either the whole card is bad or the memory on it is. Best bet is to install another video card.
9 Short Beeps Your BIOS is bad. Reseat or Replace the BIOS.
10 Short Beeps Your problem lies deep inside the CMOS. All chips associated with the CMOS will likely have to be replaced. Your best bet is to get a new motherboard.
11 Short Beeps Your problem is in the Cache Memory chips on the motherboard. Reseat or Replace these chips.
1 Long, 3 Short Beeps You've probably just added memory to the motherboard since this is a conventional or extended memory failure. Generally this is caused by a memory chip that is not seated properly. Reseat the memory chips.
1 Long, 8 Short Beeps Display / retrace test failed. Reseat the video card.
 
Ok, now have vga output (swapped 4 pin power adapter on psu for another one).
Machine now posts and boots depending on the ram setup.
I have 2 matched [supposedly] pairs of kingston value ram (2 lots of 2x512mb). In the manual it says to pair them up in dimms (A1 + B1) for pair 1 and (A2 + B2) for pair 2.
Singularly, each of the four sticks works and the system boots when in dimm A1 or B1. Likewiswe when I have a matched pair in A1+B1 it boots with no problems. However when I add the next pair (A2 + B2) there is no post/vga output or beeps. If I take out one of the last pair (either one A2 OR B2) it posts but the bios screen is scrambled and it crashes when it gets to windows.
It makes no difference which pair of sticks I use the same thing happens.
Does this still sound like a Motherboard problem? I could always get a 2x1gb matched set but was hoping to use the sticks I have to reduce costs. Also, if the board is borked it means I can't have more than 2 sticks of ram at a later date.
 
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