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Installed new system board, now no video

I recently installed an NF4SK8AA, WinFast systemboard in my son's computer, which has an AMD 64, socket 939, processor.   At first, when you turned the pc on, it beeped once and the cpu fan would spin for about 10 seconds and then stop.   I removed the heatsink/fan and cpu several times and replaced the thermal grease and eventually, it stopped beeping and seems to be running normally.  All fans on the pc are running and there is power to the hard drive.   However, now there is no video.   All cards have been removed and everything disconnected, including hard drive, floppy and cd-drives.  All memory except for one chip has been removed, and still no video.   I tried to swap out the GEForce card with a plain-jane video card and still no luck.   Cleared the CMOS, no luck.  Switched slots for the PCI Express video card, no luck.   The monitor is a working monitor and was verified.  Even used a different monitor just to be sure, but still no luck...   now I'm at a loss....  what could be causing this?
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WandaJHall
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WandaJHall
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2 Solutions
 
MarkCommented:
What are the specs on your power supply, especially the 12v rails amp ratings.
 Do you have both the 24 pin power connector and the square auxilliary 4 pin connector plugged in solidly to the motherboard.
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MarkCommented:
There is also a black molex power connection next to the top PCI-e slot which supplies 12v and 5v power to the motherboard, do you have this one plugged in also.
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Robert Sutton JrSenior Network ManagerCommented:
What type of ram are you using? Take it all out and try to boot without any memory installed. Same effect?
Does your Power supply have a 20+4 Pin main power connector or just a 20 pin? Does it have a 4 pin cpu power connector? Connected? And the power connector Sparks mentions above, is that connected?

If its a 20pin you should refer to your user manual as you will need to offset the main power connector when connecting it to the motherboard and align "Pin1:Pin1 on the power cable feed" respectively.
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WandaJHallAuthor Commented:
The black molex was not connected, never needed it before.  I connected it, but the video still does not work.   The PSU is RaidMax, ATX12V Power, Model RX-420KS (KY-520ATX)
                +3.3v    +5V     +12V     -5V    -12V   +5Vsb
10A/5A   26.0A   32.0A   13.0A   0.5A   0.8A     2.0A     Total Output Wattage  420W

Checked all the power connections and they appear to be solid.
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WandaJHallAuthor Commented:
The RAM is Rendition 512MB DDR PC3200 NON ECC DIMM, 4 chips.  I get the same result with all 4, 2, 1 and none at all.   No beeps or anything else to indicate what the problem may be.  The PSU connector is a 24pin and has been removed and reseated and appears to be solid.
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MarkCommented:
13A on the 12v rail is a bit light especially when there is only one rail. I would suggest this PSU is not supplying enough power to the motherboard.
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WandaJHallAuthor Commented:
What would you suggest I replace it with?
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Robert Sutton JrSenior Network ManagerCommented:
So, basically this is a brand new board and a used CPU, and everything else (Cards,etc)? If everything you are using was "Known" to be working prior to installing the new board then maybe you have a bad board..... I would suggest taking everything out, dis-assemble the heatsink/fan assembly, remove the cpu and start from the beginning. When you removed the Heatsink several times as you previously stated, did you also remove the cpu too everytime? If not, def. start over because maybe the CPU isnt seated properly or entirely into the 939 slot.  Do you have any other ram to use within the 266/333/400 Mhz range? Try it if you do because Ive seen mobo's that are very picky with ram in the past........Otherwise you may have a bad mobo....Wouldn't be the first time.
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MarkCommented:
Just as a precaution, did you check the SLI card position in between the PCI-e slots, ensure its set for normal mode.(single graphics card) This is written on the card and the side which has normal mode written on it is the side which goes in the slot.
I'll get back to you on the PSU.
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MarkCommented:
The recommended 12v amp rating is 22A which may be a combined rating if there is more than one 12v rail on the psu.
Here is a 12v rail calculator that may help you more as you can put all your computers pertinent info in the fields.
http://web.aanet.com.au/SnooP/psucalc.php
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WandaJHallAuthor Commented:
Thanks for the link... it is showing that the PSU should be higher, so for now... I'm going to get a Thermaltake W0093RU ATX 12V 2.0 Version 500W Power Supply, along with a new CPU and cooler, AMD Athlon 64 x2 4200+ Manchester 2.2, Socket 939/Artic Cooling Freezer 64Pro 92mm...  should arrive by Thursday and then I can tell you if any of that solved the problem.   Not the best on the market, but I'm going on a budget here.  Does those sound like they'd be okay to you?  Oh and yes, I checked the slot of the video card to ensure it was set for single....  according to the motherboard documentation, it should be seated in the pci express slot closest to the cpu; there are no jumpers or other settings that I can find that would need to be set.
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PUNKYCommented:
Also, I would suggest that to remove the mobo out of the case, place on card board, plug in basic components and power up see if you could get video signal.
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eXpeLLeD_4RM_heLLCommented:
<<At first, when you turned the pc on, it beeped once and the cpu fan would spin for about 10 seconds and then stop>>
It sounds like the mobo is shorting with the case so i would follow punky's advice and bench test the mobo outside the case.
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WandaJHallAuthor Commented:
Hi guys and THANKS!   I've split this into two for acceptance...  turned out to be two problems...  one was the cpu... there were a few pins bent that I couldn't see (bad eyes), but when I had it looked at by someone else, it was brought to my attention so I installed an AMD FX and it works with the plain-jane pci vid card, but not the GEForce, at that point, we went to the power supply and installed a Silverstone Decathalon DA650 ATX12V / EPS12V 650W Power Suppy and everything came up like a charm.
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