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problem building a computer

by mko / May 11, 2004 10:31 PM PDT

this is the closest forum relative to my problem i could think of. couple of well versed tech friends of mine are building acomputer for me and came to a problem. the computer won't power up. as in,,,nothing, dead. no spark, no sign of life. they reviewed and triple checked all their steps and came up dumbfounded.

the only thing not done at the time when they powered up was they had not installed a video card,,,,,but they didn't think a Vcard was needed to TEST the computer. they ONLY wanted to power up,,,,that's it. so after that, they unplugged everything except the two power cables to the mobo. they felt this was all that was needed to simply "power up". nothing happened.

question is now,,,,must a video card be installed in order for the unit to simply power up? if not, then the only choice seems to be a non-working power supply or bad mobo.
unless someone here can think of something. as i said, they triple checked all their steps.

abit IS-7. generic 500 watt power supply. lian-li case. plextor, sony, and seagate drives. plextor cdr-rw is master, sony dvd is slave. HD is independently connected. p4/2.8/833

thanks

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Re:problem building a computer
by R. Proffitt Forum moderator / May 11, 2004 10:47 PM PDT

2 ideas.

1. I witnessed an unique home built machine. They had bolted the motherboard to the case and no standoffs. Hint? Check that its built proper or why not pull it out of the case and move to just PSU, Motherboard and nothing else. No CPU, RAM, nothing... If I use a metal pen tip on the PWR-ON connector, I see it power up if these two pieces are good.

Place the units on cardboard to avoid shorts.

2. I didn't see if you had a POWER-ON connection to the motherboard. Or if you tried a metal pen tip to see if the power switch was defective.

Bob

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Re:problem building a computer
by Shepbob / May 11, 2004 10:50 PM PDT

Some motherboards have a jumper that has to be moved to power up the board. This is done to conserve the bios battery. Check your manual for this possibility

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This is a safe bet!
by R. Proffitt Forum moderator / May 11, 2004 11:51 PM PDT

Besides moving the CMOS RESET jumper, the battery must be "good."

I forget this one all the time.

Bob

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Re:problem building a computer
by Yew / May 11, 2004 10:52 PM PDT

What two power cables didn't they plug in? It's a rather important detail these days.

Long ago you could simply plug a power supply into an outlet and see if it would turn on. These days (with ATX power supplies), the power supply expects a couple of signals back from the computer, so simply plugging it into an outlet won't work. You have to have at least the large 12-pin plug connected to the motherboard, and given your system, I'd say the square shaped 4-pin connector that feeds the CPU power.

After that, you SHOULD be able to hear some POST beeps without a monitor, but it's useful IMO to be able to see that there's something showing up on the display.

Figure out which two cables your friends aren't plugging in, and make sure it's not the 12-pin and square 4-pin (they look quite different from any other plug because they have little clips on them). If those are plugged in, then report back and we can take it from there.

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Re:problem building a computer
by Willy / May 11, 2004 11:00 PM PDT

Without reading any of the other posters replies, I suggest this:
Check the frt. panel power-ON/OFF connection is on right connection as labeling/wording can be confusing. Plus, verify the 115/230V sw. on p/s unit is correct. Also, the best advise I can pass on is, "DON"T TAKE ANYTHING FOR GRANTED", check it.

this message approved by -----Willy Happy

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