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Discussion Starter #1 (Edited)
I am not sure if this should go here or the motherboard section. Anyway, I will try my luck here first

I am building a computer and can not get it to start. When I attach the power the green light on the motherboard comes on but the fans do not start or anything else. Just the one green light.

The components I am using are listed below.

-Pentium 4 (one of the new 533 bus cpus)
-Intel pentium 4 motherboard (D850emv2)
-PC 1066 Rambus (My Mb does not "officially support this but I have heard from many sources that it will work.
-Antec server case with 400w ATX power supply

I do not think it is a power supply problem even though the power supply fans do not come on. I read somewhere that the fans will not start until the power switch is on. This is not the case on my other machine but I did read somewhere that with this case and the P4 MB the fans come on when you hit power. Is this right? Should I get some fans when I attach the power cord? The power switch of course does nothing.

*NOTE* I did seem to get it to work for a little bit. For some reason I was concerned that my cpu heatsink was not fastened right so I flipped one of the levers that you flip to fasten it down. When I did this all of the fans came on and more lights came up on the MB. However, The way I had the heatsink levers did not match the directions (they were both facing the same way. The directions showed them facing in opposite direction) so I took out the power, rearranged the heatsing levers and tried again. No luck.

Is my CPU no good? I was a little concerned that I may have banged it or put pressure on it a bit when I was installing the heatsink because I could not figure out how it went on and may have not been as gentle as I should have. Maybe that is why messing with the heatsink made the fans go...

Is my MB not working properly?

Did I forget some crucial power hookup? I have bothe the main power and the 12v power from the power supply hooked up to the p4 board.

Could I have the power switch plug from the case attached to the MB wrong? It seems to be on the right pins but it does nothing.

Any advice would be appreciated.

(sorry about the long rambling nature of this post. I was up too late working on it and can not think straight)
 
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Hello draino and welcome to the forums..................:D

Try taking the heatsink and fan assembly off and remove the CPU and check to see if there are any bent bins.

As far as attaching the heatsink fan combo this is about as straight forward as can be.

I'll take a look at your mobo on Intels site just to be sure.......:D

Take a look here is this the same heatsink and fan setup that you have?
 

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Simple question but ....is the Power supply you are using Rated for a P4 ??? I had a 350 watt P/S in my P3 and had the same issue when i upgraded to my P4 1.9...went out and got a 550 watt power supply rated for the P4 and system booted right up and then some...dont think the wattage is enough for the CPU and CD rom and....more

*/L

and welcome to the forums
 

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Discussion Starter #4
I really should not post anymore untill I get home and can look at the machine. I just though of something though.

I did check the CPU pins last night and they looked ok but I will do it again. I was tired and the lighting was bad. One thing I know I must do is get some thermal solution for the heatsink. The original conductive foil that goes over the cpu is torn up from removing the heatsink a few times. Would a bad CPU make the system act like this or would it still start but give a bad cpu message from the bios?

Anyway, In my previous message I forgot to ask if I have all of the power hookups to the MB. Are there only two? I have two extra cables coming from my Power Supply that I can not find a way to plug in. If I remember correctly these are the fan single connector (3 pins) and the Aux power (6 pins?). I have the 20 pin connector and the 4 pin 12v connector hooked up to the MB. Also can I rest assured that my Power Supply is ok because I have the one light on the mother board and I did get fans one time?


I appreciate your help.
 

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If the power switch or the reset switch are not hooked up right it will NOT do anything. I go threw this alot in Lancaster. People build one using the parts I sold and it won't do anything. I go over and they have the wires crossed!
 
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A 400 watt power supply is more than enough for your system these processors are not as power hungry as the AMD's are.

I'm only using a 350 with mine and have no power problems whatsoever............................:winkgrin:
 
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