Question about E-Machines (308714) Motherboard

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New power supply, but turning on no signal to monitor

I have a C 6537 EMachine. I push on the power button and the fans wizz away. And the little yellow light comes on and stay lit with no blinking. The monitor says no signal and then goes blank. I put in a new power supply but still have the problem. any idea's

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  • Anonymous Sep 17, 2008

    Same problem.....suspect the power supply took out the mother board. May be the last emnachine for me. The machine powers up but the mother board doesn't seem to be sending a signal to the hard drive to do anything. the monitor sceen initially shows black with power down in 5 seconds. Am I on the right track or missing something. I'm no expert.

  • landhunter1 Sep 28, 2008

    same

  • mesham99 Nov 20, 2008

    I too have the exact same problem. I replace power supply with new one. It powers up, fan works, chip fan works, I also see a 'RED' LED light on, next to memory chip. Tried several monitor's, same reading, NO Signal!

    I suspect the video card, integrated into the motherboard was zapped, or the mother board itself has gone out.

    Have anyone out there been able to resolve this problem with out have to spend a million dollar trying to figure it out?


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  • 119 Answers

Well this is one of the nightmare problems I keep got into ..there can be alot of posibilities..but the most common are the video card is damdaged or the mainboard.try to change the video card and check than.if the problem persists,than is a motheboard fault..look to all the condensors,chech the intefrity of your connections..
good luck.
it is  a very booring work.

Posted on Feb 03, 2008

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1 Answer

Dont show video but it turn on perfectly


Usually indicates a bad Power Supply.

LED lights light, fans spin, but NO Signal on monitor.

No Video Signal, because the computer isn't sending one out.
Because the computer isn't working.

Know this;

1) If ALL the LED's were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical processor can use from 51 to 125 Watts of power.
Just depends on what Processor it is.

A Power Supply with a weak voltage power rail, will not have enough power to turn the Processor on.

However not to jump the diagnostic flow chart; check the monitor cable FIRST.
Use on another known to be working computer. If it checks out OK, the problem is the computer, and I think -> Power Supply.

Test the 3 main voltages on the Power Supply, with a multimeter set to DC Voltage; OR use a KNOWN to be good, Compatible power supply, for a test unit.

For additional questions please post in a Comment.
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Either the new power supply you purchased is not functioning correctly. But, assuming it is now that you are getting some form of power to your PC, it is very likely the motherboard. Whatever fried your old power supply (or it could have just been the power supply itself) most likely fried your motherboard in the process. Probably not the CPU since the MB can't even post.

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