Question about HP Pavilion s7320n (EP140AA) PC Desktop

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Video No video output. Screen black. Suspect onboard video bad.

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Re: video

Try a different monitor first and see if you have the same problem

Posted on Jan 09, 2008

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Solid amber light, fan attempts to starts, but fails. I think it's a bad motherboard. How can I be absolutely certain?

I would suspect the power supply over the System Board.
You will need a large antistatic bag or antistatic mat plus a ground strap and a power supply checker.
Check the power supply using a power supply checker (about $10.00). Unplug the power connector on the mother board and plug the connector into the power supply tester. If you do not have a power supply tester let me know how many pins are on the connector and I will tell you how to test it with a volt meter. If any voltage is not present, replace the power supply. If you do not have -5 volts it was used for ISA slots and was completely removed from the ATX standard in 2004.
Do you have an onboard video card? If you do is that the video output you intend to use or a external video card? If you have onboard video connect the monitor to the onboard video output. Disconnect the AC power supply cord from the computer and attach a ground strap from your wrist to the bare metal of the power supply. The down side of static damage to components is you do not always see the damage immediately since static can weaken components causing future failure. Remove all cards from the slots except the video card if you do not have the onboard video. Be careful to touch only the edges of the boards not the connecters and place them on the antistatic mat or in the antistatic bag. Plug the power supply back in and see if the Power On Self Test (POST) displays the boot process on screen or beeps are audible. The error beep codes can change from the BIOS types but these are a few generic ones. It would be best to check your motherboard manual for a complete listing of error codes.
1 short beep – System is OK
No beeps – Bad power supply or system board
Continues beep – Memory error
1 long two short beeps - display adaptor

If no video is displayed and no beeps can be heard, turn the system off by holding down the power button for 5 seconds then unplug the unit. Verify the ground strap connection on your wrist and the bare metal of the power supply. Carefully remove the memory sticks handling only by the edges noting which slots they go in and which module was taken from which slot and place them on the antistatic mat or in the antistatic bag. Plug the power supply back in and see if a continues beep is audible. If yes, power off the unit and unplug the power cord. Put only one memory module in the first slot but do not put the same module in the same slot (swap them) if you have more than one module. Restore power to the system and see if the continues beep is no longer heard and you see video. If you see video and no continues beep than power the unit down and unplug the unit. Do the same for any other memory module which will help you determine if any modules are bad. This test is not a complete test but if any modules are dead you can identify them. If no video and no beeps the motherboard is the suspected problem.
If you have video and one short beep upon power on and all memory checks good. Power down the unit and unplug the power to the power supply inset one of the removed boards and try to boot the system to see if you still have video. If you do power the system down and repeat the same procedure for each card. If you do not have video suspect that card is bad.
Good luck and be careful to always touch the bare metal of the power supply with it unplugged before reaching inside the computer and touching any boards.

Aug 13, 2010 | Dell Vostro 200 Desktop Computer

1 Answer

Im trying to install my ATI Radeon 9250 265mb graphics card and I have installed the Catalyst control center but when i turn off my computer and unplug my machine and put in the graphic card (PCI) And boot...

There may be a setting in your BIOS for your video output.

If you were originally using the onboard VGA video output, there may be an option in the BIOS to switch to PCI output.

Jul 11, 2010 | HP Compaq Presario SR1820NX (ER919AA) PC...

1 Answer

After switching on my PC (Windows 7), the screen

Well it'd be nice to know the make/model, I can atleast assume it's an hp because of where this is posted. Some additional details that lead up to you wanting to restore to a prior date would help too. Also,if it goes black as you say,how is it that you could get into system restore? Or was that a typo? Anyway, here's my shot in the dark, see if there's power anywhere on the pc when it goes black,ie. hard drive spinning,fans,diagnostic lights,sound,etc. If it does, then if it has onboard video & you use a graphics card, remove the graphics card & plug the monitor into the onboard port. If this fixes the problem,you need a new graphics card. If it only has onboard video,then open the computer & see if there's a graphics card slot & install one if you have one that is the proper slot type. Don't worry,can't put the wrong kind in,they all have different connectors. If doing that fixes the problem, the motherboard is going bad & the video chip was the first to go. Now all this is assuming it's a desktop,laptops have built in video only & most have a port on back for an external monitor,which you can plug into to see if the same problem happens,if it does,the motherboard is bad. Post back with the additional info if this didn't help.

May 13, 2010 | PC Desktops

2 Answers

No signal and onboard video, bad memory?

yes normaly if there is a memory problem you will get no disply output hope this helps you can fix this by adding new memory and resetting the bios helps sometimes

Mar 18, 2010 | PC Desktops

1 Answer

H Slimline New Graphic Card-No new DCI output-Yes old VGA output

you are missing nothing actually the graphic card over rides the onboard graphics and you have to use the graphic cards output ,only one hardware at a time for pci devices

May 08, 2009 | PC Desktops

1 Answer

Monitor freezes up with multicolor wording or distorted images

Sounds to me like a few possible things...

1) Bad connection to the monitor, check the cable connection, if you see or suspect any damage, buy a new monitor or test with a friend's monitor.

2) Video card could be bad, if it has a video card, you could simply buy a new card to see if it will fix the problem. If the video port is attached to the motherboard (meaning onboard video), the motherboard could be damaged.

3) The motherboard could be bad. Sometimes fried motherboards will garble the screen like this on bootup.

Mar 25, 2009 | IBM PC Desktops

1 Answer

Onboard video has do I change in bios to video card ?

first install the video card in the pci slot first so that you have access to your monitors screen for you to disable the on board video chip or video card, go to the CMOS setup by pressing del key. once there you can browse through the CMOS setup to disable the on board video chip.

Dec 22, 2008 | Gateway GM5088 PC Desktop

1 Answer

Video card not working, monitor goes off

     In the bios there could be setting to disable your onboard video. Since the output was broken, see if there is an option to disable the onboard setting. If you do this and you are still having problems, I would go ahead and start in safe mode, then lower your resulution to the lowest settings till you can get the video drivers loaded for the new card that you have just bought. 
                                                                Joe < Data Miner >

Oct 31, 2008 | Dell Dimension 3000 PC Desktop

1 Answer

Hp compaq dc5000 small form factor

Hi, uninstalling the onboard video will only be reinstalled by Windows next time you boot up. Disabling it in the Device Manager might and mght not do the trick if your mb is set on using the onboard. You might want to try and disable the onboard video in the CMOS/BIOS set-up. In some instances, you are asked in the BIOS what video will be used such as onboard, AGP or PCI or a selection of something like that. Also you can try and not allocating any memory to the onboard video. Hope this be of some help. Pls post again how things turn up. Good luck.

Apr 28, 2007 | HP Compaq dc5000 PC Desktop

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