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Motherboard will not boot

An asus pp4p800 motherboard will not post at all, no signal going to the monitor with any graphics card of any type. Have changed memory chips to every config possible, still no post. Have removed the bat fopr a tiome and still no post. Any ideas?

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The first question; is there power to the board? If so what lights are on and are they steady? Are the fans running, Have you tried hooking it up to the onboard video port. Ensure to unplug and remove anything that is not essential to boot. If these ideas don't help keep me updated with details. Thanxs

Posted on Feb 01, 2008

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No signal on Moniter

No signal errors on monitors are often due to your graphics card attempting to run an unsupported resolution or refresh rate (or both) for the monitor in question.

Given the situation you have described my best guess as to the cause is that your graphics card went kaput. If your graphics is integrated into the motherboard and you don't have an individual graphics card in an expansion slot, I recommend trying other graphics connectors, as integrated video usually has at least two different types of connectors. This will at least give you some information upon which you can perform further diagnostics and eventually isolate the problem with certainty.

If you have a compatible graphics card for the expansion slots on your motherboard, try installing it, connecting the monitor to it, and then powering on your PC. Additionally, if you have one available, try connecting a different monitor to the desktop, or if it has an HDMI output try connecting it to your TV.

One last thing to try is to clear CMOS by unplugging the tower from the wall outlet, removing the circular battery on the motherboard for 30 seconds, then replacing the battery, restoring your power connection, and trying to boot your machine. Sometimes you have to use a jumper on the motherboard to clear CMOS, and if so you'll need to consult the manual for your specific motherboard.

There are numerous other possible problems which could be causing these errors, but what I've listed above is hopefully the best place to start your troubleshooting.

May 22, 2014 | Acer Aspire X3200 PC Desktop

2 Answers

Gateway GT5040 Graphics Card

This model Gateway desktop computer has a built-in video card.
Connect the monitor to the Gateway motherboard video port and the boot up and go into the BIOS and select disable the built-in video.
Shut down then connect the monitor to the 8800GTX video card and boot up the Gateway computer. The video should then appear in the monitor.

Feb 14, 2013 | Gateway GT5040 PC Desktop

1 Answer

I have HCL Ezeebee desktop computer when we boot the system monitor, keyboard, mouse blink for a while and monitor (HCL) show 'no signal' message, and keyboard num lock led not display mouse i

No signal at the monitor indicates (if you know the monitor is working ok) a failure of the graphics chip or graphics card, The lack of indicator light on the num lock LED and the lack of power to the mouse would indicate that there is a major issue with the motherboard.
you can try using another monitor to confirm the problem lies with the graphics, and in the case of the keyboard and mouse, swap them for a usb version, if they work, the Ps2 ports are probably damaged.
I'd be thinking of replacing the motherboard

May 19, 2012 | PC Desktops

1 Answer

My monitor says no signal, but my computer is booting. I tried another monitor and same thing. Do I need to replace the graphics card?


You do not say which operating system you use.

Have you tried the same monitor but a different monitor cable?

When you say it boots, can you see the hard drive activity light flahhing, can you hear the windows login tone. Unlees you can see and hear all these things, the computer is not booting (worse news). If you can, it is (better news).

If your monitor port is in the same, small 6" (15cm ) rectangle on the left hand side of the computer near the other ports USB, mouse, keyboard etc., then your graphics chip is on-board, irremovable and fused to the motherboard.

If it is on its own, lower down, near the botom of the computer, you have a separate, dedicated Graphics Card, which can be replaced.

If it is on-board graphics that is faulty, you can add (rather than "replace") a graphics card to bypass the on-board graphics chip.

If the on-board graphics card is faulty, there may be a fault in the graphics bus on the motherboard, so a separate, new graphics card might not work.

First you need to continue the process of elimination to isolate the fault.

Try removing all cables from the back of the computer, opening it up, carefully cleaning any accumulated, dust, dirt and grime from the inside with a vacuum cleaner with a thin attachment, then carefully using a screwdriver to unclip and remove and reinstall the small CMOS battery for 2 minutes. This clears the BIOS memory from the motherboard. Then reconnect the cables and test again.

Then I recommend taking the tower to a repair shop and asking them to test a used, higher wattage Power Supply Unit. Sometimes underpowered PSUs can cause a stalled boot.

If this does not work, ask them to test a used, dedicated graphics card. If it works, buy a new warrantied graphics card.

If the graphics card does not work you might either need a new motherboard or a new computer base unit (tower), depending on the comparative cost of the motherboard + the labour for reinstalling and configuring the new motherboard with your original hard drive and its operating system + the cost of diagnozing the fault and installing the motherboard and a new computer base unit.

I hope this helps.

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Aug 31, 2011 | Acer Aspire M1641-U1521A PC Desktop

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My m.board is directly power on and not giving any display mother board model is via- vt82c686b

Bear with me as this will be lengthy.

You're looking at a VIA Southbridge chip.


The Northbridge chip, and Southbridge chip, make up the motherboard chipset.
(For the technology used in that motherboard)

In the motherboard diagram above, CPU stands for Central Processing Unit. Another term used is Microprocessor, or simply Processor for short.

The Northbridge chip of the motherboard chipset, handles the faster processes of the computer.
The Southbridge chip handles the slower processes.

The Northbridge chip handles the Processor, Ram Memory, and high speed graphics.
High speed graphics being AGP, or PCI Express.

Not a graphics card inserted into a PCI slot, and not Integrated Graphics.

The Southbridge chip handles Integrated Graphics, or a graphics card inserted into a PCI slot, or any adapter card inserted into a PCI slot.
Anything to do with a PCI bus.

It also handles IDE devices such as an IDE harddrive, (Or harddrives), and IDE optical drive/s, (CD/DVD), plus SATA devices.

Plus it handles USB ports, an Ethernet port, and so on.
[The rest of the slower processes are detailed in the motherboard diagram]

The Northbridge chip on your motherboard will be under a Heatsink.
The Heatsink is glued on to the top of the chip.

(Chip and Chipset are slang terms for I.C.
Integrated Circuit)

This photo shows a typical motherboard, and the Heatsink on the Northbridge chip,

In the center of the photo you will see a square aluminum looking object, that has fins on it.
This is a Heatsink, and it's attached to the top of the Northbridge chip's case.

You can left-click on the photo to enlarge it. You can click twice.

(This Asus A8N-VM CSM motherboard, uses an Nvidia Northbridge chip, and an Nvidia Southbridge chip. The VIA chip you see is a Firewire controller chip. VT6307)

To your problem;

1) If your monitor cable is removable, remove it, and use a KNOWN to be good one. Check to see if it's a bad monitor cable.
If the monitor cable is not removable, use a Known to be good monitor, and it's cable.

2) The problem could be the Integrated Graphics on your motherboard. The GPU could be bad.
(Assuming you're not using a graphics card)

[ Integrated Graphics, and GPU:

GPU stands for Graphics Processing Unit. It is a chip.

The GPU could be soldered directly to the motherboard, or soldered to a removable adapter card.

Soldered to the motherboard = Integrated Graphics.
Another term used for Integrated Graphics is OnBoard graphics.
ON the motherBOARD.

Integrated graphics used on your motherboard, will have a blue VGA port that you plug your monitor into.
Newer motherboards will use either a VGA port, or a DVI port, (White), or both.

Soldered to a removable adapter card = Graphics Card.
Also known as a Video Card ]

The way you would test to see if Integrated Graphics is bad, on your motherboard, is to use a graphics card.

3) A VERY large percentage of computer problems is a bad Power Supply. Weak voltage power rail.

Has enough power to light LED lights, and spin fans, but not enough to turn the Processor on.

A) ALL of the LED lights combined use less than 1 Watt of power.

B) EACH fan uses 2 to 3 Watts

C) A typical Processor can use 51 to 125 Watts.
(Older Processor's, such as an Intel Pentium III for example, use less power)

No processor operating, No computer.
No computer = No Signal on the monitor.
No video signal.

Aug 15, 2010 | Toshiba PC Desktops

1 Answer

Foxconn NF4SK8AA-8EKRS will not post

I believe that there is no on-board graphics for that motherboard so I guess that you are using a graphics card?

  1. Try another monitor
  2. Try another cable
  3. Replace the graphics card

Sep 15, 2009 | PC Desktops

2 Answers

Monitors won't work with Gateway Desktop

Do you see anything on the monitor at all when you boot up? If not, then the graphics card or onboard video is bad. If you have onboard video, then you just need to purchase a graphics card that will go into an available graphics slot inside your PC. If you have a graphics card already in there, then it will need to be replaced. If you can see the boot up screen but stops displaying video when you go into windows, then the resolution is set outside of your monitors capabilities; you will need to boot into safe mode, then reset the resolution to 800 x 600 and reboot; then you can set it to perform within your monitor's capability.

May 31, 2009 | Gateway PC Desktops

1 Answer

Monitors wont work

It appears that you have a faulty graphics card.
If the graphics card is integrated with the motherboard then it cannot be repaired. Just purchase a new AGP graphics card, insert it into the AGP slot and connect your monitor to this card.
You may need to go to the BIOS setup to disable the on-board graphics card.
If you don't have an integrated graphics card, then buy a replacement graphics card.
You will need to install the new graphics drivers after installing the graphics card.

Nov 13, 2008 | Gateway 310 S PC Desktop

1 Answer

"No Signal" on monitor after boot

hi try to use different slot on your motherboard see if that helps if not try different video card...if that didn't help it might be your motherboard that went bad

Aug 23, 2008 | HP Pavilion a400n (DQ173A#ABA) PC Desktop

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