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NEW Motherboard

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by grayfoxes

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I'm in the process of building a system and have run into some very unusal happenings. I have purchased new motherboard, new processor and new memory, all compatible with each other. I have swaped out the motherboard once, the processor once and put in a new power supply. I still get no video feed to the monitor. Does anyone have a suggestion?

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by mjd420nova

I have encountered this problem with a large number of units after MOBO replacement or in a lot of new build units. There are a number of insulating washers that need to be placed on top of the standoffs that mount the MOBO to the chassis. These washers often get misplaced or missed altogether when replacing the MOBO. This results in shorting of the power supply and a failure to display anything on power up. In new builds I do myself, I replace the standoffs with nylon or plastic ones to eliminate this fault. On repair units, I will use a dab of rubber cement to hold them in place as they will shift around some during repeated heat and cold cycles of the unit being on and off. The video card has to boot first, unloading its BIOS to the CPU telling it where to send the CPU BIOS. The video BIOS will be first, then the CPU BIOS, then memory count and so on.

by grayfoxes

I had thought of this, but even with the MB setrting on my work bench on anti-static material I still have the same problem. It really has me puzzled

by mjd420nova

Some of the newer video cards require a power connection directly from the power supply. The video card has to be the first to start or the CPU won't start either. Possiblly the power supply is too weak to start the video card. Does the fan on the power supply turn? Does it start to turn and then stop? If so, then it is seeing too much current draw and is seeing a short or the video is drawing to much. Most units with 128 MB need at least a 500 watt supply and this should be an average rating, not a peak rating.

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