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New motherboard, no video


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#1
Lacy

Lacy

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;) I've been loosing sleep over this one for 3 days now. I just bought a GIGABYTE RZ Series Motherboard (8S651M-RZ (-C)) SiS 651 chipset. And an intel Celeron D Processor 2.40 GHz, 533 MHz FSB, 256 KB L2 Cache. I also purchased 256MB of 400MHz DDR RAM. These are the new componants I got to go along with some of my older componants. I put the chip into the motherboard and attached a 300W power supply. Then a 20Gb hard drive, a floppy drive, and a cd-rom drive and a cd-r/rw drive.
The motherboard has an onboard VGA (SiS651 chipset), I plugged it in and I couldn't get nothing but a blank black screen, no bios, no nothing. I know it must be something simple that I have overlooked but for the life of me I can't get my finger around it. I get no video. Monitor is on and working but constantly remains blank. Please help me find some light in an ever dark monitor. :tazz:

Edited by Lacy, 08 August 2005 - 02:12 PM.

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#2
tenbroya

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So you don't even get into BIOS.

Hmmmmmm....

Have you checked the power supply with a multimeter to check its throwing out the right voltages, sometimes even if they get a bit hot some wires may melt together and short the whole computer. (Happened to me twice!!!!!).

You should be able to find a diagram of Voltages on this site:

http://www.fonerbooks.com/power.htm

At just over halfway down the page. To measure turn your multimeter to something like the V 20 setting. You put the black probe in the ground wires and test the others with the red probe.

Check your voltages against the ones in the chart.

If you find a huge difference (a difference of 1 or 2 volts won't make a difference) then you are either measuring it wrong or the PSU is screwed.

Post back if you have any problems with this.

Tenbroya
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#3
Stasiek

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check these,

1-make sure your power supply is plugged into the outlett (working one) on back of power supply there should be a indication of available power, by some sort of led light
2-make sure your power supply is properly connected to the drives and motherboard (motherboard should have 2 connection to power supply)
3-if your power supply has a on/off toggle switch press to on position

if all is good start pc :tazz:
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#4
Lacy

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check these,

1-make sure your power supply is plugged into the outlett (working one) on back of power supply there should be a indication of available power, by some sort of led light
2-make sure your power supply is properly connected to the drives and motherboard (motherboard should have 2 connection to power supply)
3-if your power supply has a on/off toggle switch press to on position

if all is good start pc ;)

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:tazz: First thing I did. Fan on power supply works and it also powers the fan to the CPU. Any other Ideas?
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#5
Lacy

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So you don't even get into BIOS.

Hmmmmmm....

Have you checked the power supply with a multimeter to check its throwing out the right voltages, sometimes even if they get a bit hot some wires may melt together and short the whole computer. (Happened to me twice!!!!!).

You should be able to find a diagram of Voltages on this site:

http://www.fonerbooks.com/power.htm

At just over halfway down the page. To measure turn your multimeter to something like the V 20 setting. You put the black probe in the ground wires and test the others with the red probe.

Check your voltages against the ones in the chart.

If you find a huge difference (a difference of 1 or 2 volts won't make a difference) then you are either measuring it wrong or the PSU is screwed.

Post back if you have any problems with this.

Tenbroya

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Everything seems fine. I still get no video. Anything else you could suggest?? :tazz:
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#6
Doby

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Hi,

Try this troubleshooter and see if anything in it helps out.

Rick
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#7
rjr1876

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check if the board is shorted. It happened to me once, same syndrome like yours, so I unpluged everything, reseat the mother board again, and it worked. If it still doen't, you can lay the mother board on a wooden table (or any insulated surface), then connect just the the power supply, monitor & keyboard. Power it up and see what happens? Sometimes an improper designed casing will short part of the mother board

good luck

tai
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