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Screen does not display, pc not booting

By hiteshdhokia ·
While working on my pc yesterday, the screen suddenly went black and there was no signal being fed to the the screen and then the screen keeps turning off. I thought it was a graphic card prblem and changed it but it still does not display. The fans on the graphic card are not spinning, so probbably its now a motherborad problem. To add to this,the computer still turns on but there is no 'beep' to say that it is booting up. Please can anyone help as I need this pc up and running as soon as possible!. Thank you for your help!

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by 3xp3rt In reply to Screen does not display, ...

It seams to be a CPU or memory problem. Checks the CPU fans if start working when power on the computer toy. If work, try to replace the memory module. (I understand from your description the power source work fine, so is not a power problem)

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by hiteshdhokia In reply to

Poster rated this answer.
I have not tried to replace memory yet. but will do that tonight and see if it helps.

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by HAL 9000 Moderator In reply to Screen does not display, ...

Lets see if I've got this right. The computer is working except for the Video Card Fan and you are not getting any display right?

I'm taking it that you think that the computer is working because the front panel LED's are lit, is that correct?

The first thing to do is disconnect the mains lead and clear the BIOS this is generally performed by changing a jumper on the M'Board and will be in the System Manual or M'Board Manual. Then after the specified time reset the jumper and try booting up if it's going to work you'll get a BIOS Error Message that will mean that you need to enter BIOS and change at the very least the Date & Time then chose Performance Option and save the settings.

If you are still not getting any video signal to the monitor try testing the monitor on a different computer and the computer with a different monitor and see what if anything happens. Also try starting the computer with the cover off and see if the CPU fan is working if there is one installed, if there isn't check the Power Supply Fan is spinning.

Quite often a PS Fan will fail and take the Power Supply out with it.

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by HAL 9000 Moderator In reply to

When you said you where working on your computer do you mean using a program or delving around inside it? If it's the latter it could be anything at all so I would start off with a PS Tester and Multi Meter and run the PS and check the 5 & 12 VDC voltages to make sure that they are actually within spec. You should also check all the connections in the computer as one single plug not seated properly can cause this problem the mains ones to look at are the Main Power Connector and any secondary Power Connectors. The ATX 20 Pin plugs can work loose in their sockets and give a similar problem to what you are experiencing so make sure that everything is properly seated.

If you still have no joy remove everything except the CPU/Heat Sink Video Card and 1 Stick of RAM unless your M'Board required two sticks to work. But before you apply power remove every plug & Card and re seat them all and then try again. If this works replace one item at a time until everything is fitted or the unit stops working when you reach the point where it stops working you'll know what the culprit is as it will be the last thing fitted.

Col

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by hiteshdhokia In reply to

Poster rated this answer.

Thank youfor your help
The computer is working and there is no display. it keeps turning my screen off.

The led's are also on and working as is the cpu fan. However if it was just a display problem the computer should still boot, but it is not booting as the ritual 'beep' when you first start it is not there.

i have also cleared the CMOS if that is what you mean by BIOS. The motherborad manual said to clear to BIOS remove the batteries for 30 seconds and then rreaplce. This did not work.

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by HAL 9000 Moderator In reply to Screen does not display, ...

Just one thing here when you removed the battery did you have the Mains lead disconnected?

If you didn't then the CMOS will not have been cleared as ATX Power Supplies supply power when switched off they actually switch on the Negative or Neutral in Conventional Electron Flow depending on which form you are familiar with. But there is always power present even when switched off at the front panel.

This helps to prolong the Battery Life.

Col

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by hiteshdhokia In reply to

Poster rated this answer.
Yes, the power cord ws completely detached from the PC

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by hiteshdhokia In reply to

Poster rated this answer.
Yes the power cord was completely detached from the PC.

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i can almost swear that it's going to be the motherboard.

you've ruled out the video card already by replacing it with a known good. if it were bad RAM, you'd probably get some beep codes during post, if it were making it that far. no beep = no post. Which pretty much leaves the board and the power supply. the power supply seems to still be functioning, which leaves the board. it could be just a bad slot on the board. do you get the POST "beep" if you try to boot it up with no video card? what type of card is it? agp?

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by hiteshdhokia In reply to

Poster rated this answer.
Thank you very much for your answer. I do not get a post boot beep and yes it is an AGP card. I have also now ruled that it is the graphic card controller. As i have put a friends graphic card in and it still does not work. i.e the fans do not spin. The only thing im still questioning is that my graphics card has a separate power supply and my friend's card does not, and neither fans on both the graphic cards spin.

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