New PC does not boot

By simcat ·

Unfortunately, I have the following problem and need some help

I purchased some new stuff - MB Asus P5K, Core Duo E6550, Thermaltake chassis, OCZ DDR2 2x2048 Titanium

Actually, it does not work - the cooler starts working for a moment, then stops. If I press PWR button again - nothing happens until I remove the cord, then the story repeats.

I disconnected evrthg except the processor (even removed the DDR2) - the same story.
Another PSU unit did not help.

Checked the power connection to the MB - 24 pin is ok, 4 pin is ok. The pwr LED on the MB is on.

Any ideas? Thanks in advance.

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All Answers

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Remove the CPU Heat Sink

by OH Smeg Moderator In reply to New PC does not boot

And make sure that the CPU is correctly inserted in the Socket.

There are to cut outs in the CPU that have plastic lugs in them from the socket to fit the CPU to the Socket. I've seen a couple of Home Builds now where the CPU is incorrectly fitted to the socket and they do this.


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Also look for the "Jumper 1"..

This will be a little plastic jumper that sits over two pins, look at/in your manual for this.
Find out if the jumper is seated ok or if it is in the wrong place. Another thing could be a faulty power supply, make sure that you have a psu (power supply unit) around the 7oo to 750 watt range. You might need to check that your 4 pin (12 volt) cable IS properly fitted, many times i had to check mine because of this problem. You will need to firmly press this plug in to its socket. you do not need to fit a hdd as yet, just make sure that you start with around 2gb of ram, if the computer fires up and you can access your bios then all is well. Fit in your hdd and then install your operating system and all of the updates, then the most importantly update your bios, but make sure that you save the old bios on your hdd, you can do this through the bios. Please read your manual for this or on the Asus web site. I have also the similar motherboard as yours and it works fine. The most important is that when you install your processor place a VERY small amount(and i mean a small amount) of thermal paste on to the processor and then fit on the heatsink and fan. Hope this all works out for you.

Please post back if you have any more problems or questions.

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Power supply faulting

by mjd420nova In reply to New PC does not boot

One of the biggest problems with new builds is the placement of insulating washers in the right place on the underside of the motherboard. I eliminate this problem by replacing the standoffs with nylon or plastic ones and using nylon screws to secure the motherboard in place. This also eliminates the shorting of the power supply in the future as the unit runs through heating and cooling cycles which will make the MOBO grow and shrink, moving around some on the standoffs. That's what you are seeing is the power supply seeing a short on power up, trying to start and then shutting down. Pulling the plug resets the circuit and allowing another restart.

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thanks a lot - I did it

by simcat In reply to New PC does not boot

Thank you very much for all your help and assistance. Yesterday I solved the problem.
I went to the store where I purchased everything and brought them my MB for check. THe guy there advised to remove the battery, wait a little and try again.
I tried that, and it worked!
But when I put the MB and stuff into chassis, same story began.
The problem was in the insulating washers - because of them short circuit happened again and again.
I removed almost all of them and left only four to fix the MB.

Thanks a lot again for your help!

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One word of caution for your 'solution' ...

by OldER Mycroft In reply to thanks a lot - I did it

You are now at risk of the motherboard flexing by having ONLY 4 stand-offs securing the motherboard to the chassis.

Some, if not all, of the stand-offs that you have removed will have left the motherboard pliable when any force is applied to it. Force works BOTH ways - while inserting OR removing an expansion card or RAM stick.

This flexibility could eventually be your undoing - by damaging the data lines on the motherboard.

//End of rant//

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Good advice Old fella :)

by Jacky Howe In reply to One word of caution for y ...

mjd420nova has already explained about expanding and contracting. :)

I wouldn't run it.

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