New Build Problems, Need Some Help

M

methocl

Limp Gawd
Joined
Nov 10, 2005
Messages
174
Well, I just installed all new hardware into a brand new case. When I press the power button sometimes the fans start spinning, but I get nothing on the monitor and no beeps from the motherboard. Other times, the fans spin for less than a second and stop.

I've tried reconnecting the powersupply to the motherboard, disconnecting everything and reconnecting and still it yeilds the same results.

Please, if you can, help. I've been messing with this all day, but can't seem to figure it out.

Specs are:

AMD 3700+ with stock heatsink/fan
Asus A8N SLI Deluxe
eVGA Geforce 7800GTX
2GB (4 x 512) Corsair TwinX DDR RAM
80GB Seagate Barracuda IDE HDD
Generic CD Burner/DVD ROM Drive
Antec SuperLAN Boy Case
 
I don't see a psu listed on your list of specs. What psu do you have running in that rig?
 
What other troubleshooting have you done? Have you done a minimal boot, ie no peripherals? Booted piece by piece?
 
I have tried booting with the CD rom and hard drive disconnected and get the same thing. I have also tried removing sticks of ram, in all combinations. The only things connected to the board is the vid card, PS, processor fan and processor, and a keyboard and monitor.

I have also tried using a DVI cable and a VGA cable with the DVI to VGA adapter.

Any ideas?
 
I think most motherboards have to have a working processor to post. All other peripherals give off beep codes. Chances are it's your proc.
 
Well, I exchanged the Mobo and Proc for the same exact models at Fry's, installed and the thing still won't post. I even tried another PCI-E vid card I had and same thing.

Also, I've noticed that after I power it on, and the fans start to spin, pressing and holding the power button does not turn the machine off. I have to manually switch off the powersupply or unplug.

I am really at a lost here...Anyone else got any ideas?

:(
 
I want to try a new powersuppy now, but the only other one I have is a thermaltake 450w with the 20 pin molex connector only. Does anyone know if there is any problem connecting a 20 pin molex to the 24 pin slot on the MB?
 
methocl said:
I want to try a new powersuppy now, but the only other one I have is a thermaltake 450w with the 20 pin molex connector only. Does anyone know if there is any problem connecting a 20 pin molex to the 24 pin slot on the MB?
Click to expand...

Yeah, it won't power up.
 
Only other thing I can think of is either your CMOS jumper is offset, shorting the board, or maybe the back of the case is touching the motherboard.
 
bmartin said:
Only other thing I can think of is either your CMOS jumper is offset, shorting the board, or maybe the back of the case is touching the motherboard.
Click to expand...

Thanks, but I've double and triple checked the CMOS jumper. It is in the right position. I don't think the motherboard is touching the case at all, I have the copper screws placed at each mount point for the motherboard, and the motherboard is screwed at each point.

Hmmmm....I'm going to try and reseat the processor one more time. I'm also thinking of taking everything out the case and doing the "cardboard test." I just can't think of anything else. Thanks everyone for the help in trying to diagnose this.

Please if anyone has any more suggestions, I'm all ears.


:confused:
 
I know mainly this is an old abit issue, but on the board, do you see any of the mosfets swelling? Its a possibility, though rather small one.

I would say go out of case as well. Try it there. Reseat everything. Does that board have SLI jumpers? (DFI style)
 
You've tried just booting with 1 X 512?

I had an Asus A8V Deluxe that would do the same exact thing. Monitor would stay black, board was getting power, fans would turn on when they wanted to, everything. But no post.

Took out a stick of ram, changed bios options and voila. Just a thought.
 
I had this problem recently. It turned out that my RAM wasn't seated properly. I had to use one stick initially, then put the second stick in later. Then I couldn't get the thing to run except with one specific combination.
 
I just had a problem like that, and in an attempt to fix my problem I read a lot of info so here is my thoughts, are the peripheral connectors firmly plugged into accessory devices, such as the main hard drive,cdrom,etc also 2 if a plug has been inadvertently connected in an off-set or reversed position, unplug the acpower source, reconnect the offending connectors and wait 30 seconds before replugging the AC power source and try again. If the power up after this power supplu m,ay be bad you can test the power suppy by unhooking all leads and taking a paper clip and connecting the green wire to any black witre on the 20 or 24 pin connector to see if the fan start on the power supply and keep running at least on the Thermaltkae 420 watt I have this works. Gook Luck
 
Well, after a lot of reading on the asus a8n support site, I think I figured out what my problem was. I realized that I never connected the extra 4-pin ATX12V1 power connector to the board. I connected the 24 pin connector to the board, but overlooked the extra 4 pin, right above the processor.

Doh!!

Well, i'm going to try that when I get home, and I'll report back my experience.
 
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