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When i turn my computer on i get a black screen, no picture. i have put a new power supply and video card in and still the same results. when i mash the power button it will not turn off.

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  • samantha_ang Aug 19, 2008

    Hi thank you. I have hooked another tower to the monitor and the monitor works good. I puzzled???

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  • 197 Answers

Try another monitor . and on the video card try putting it in another i and o port they should be eather white or sometimes brown. if you cant get it to work it sound like you need a new monitor.

thanks

hope this works for you

Posted on Aug 19, 2008

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Hanns g hx191d no picture. My monitor went black while I was working, the green led is lit, I get a picture for a split second when I first turn on the computer or monitor.


Hello,

The most common cause of this type of display issues is a failure of the back light power supply. There are parts called capacitors that fail and this causes the power supply to not be able to put out the correct voltages to operate the monitor. You cn repair the monitor easily by replacing the bad capacitors on the power supply board. The old ones need to re desoldered and the new ones soldered back in place. You can get a kit of the proper capacitors to do the repair here:

http://www.ccl-la.com/catalog/product_info.php?products_id=194

Nov 02, 2012 | Hanns.G Corporation HW191D 19" LCD Monitor

1 Answer

Asus p7h55-m black screen when i installed video card.. then i thought my video card is not functioning.. i get it and use on board vga.. its the same problem.. black screen, keyboard no light.. no si


Have you tried removing the new video card? Try that first.
The fact that your keyboard doesn't light most likely means that either your power supply is being pulled down by the video card or is now gone. Was your power supply rated high enough wattage for your computer with the new video card? If the video card was higher-end then it's possible that it killed the supply.
It could also be the motherboard that's gone. Static discharge when putting the video card in, or a bad video card can destroy a motherboard.

May 31, 2012 | ASUS P7H55-M LX Motherboard

1 Answer

I have done all that you saud to do. Now the problem I have is the computer will not turn on at all. It's like the power has been turned off from inside the operating progam. I have windows 7, is this...


10_24_2011_12_18_38_am.jpg

Phase 1
After power button pressed, computer will detect 5 components :
1. Power supply - OK (enough power)
2. Main-board - OK
3. Processor - OK
4. Memory - OK
5. Video Card / VGA - OK
== beep sound .. (1 time) or on the monitor, display appears BIOS ==

The characteristics of damage to power supply
1. Power supply fan does not spin


Video power supply fan not spinning

If the power supply fan is not spinning, the possible cause of damage to power supply. Solution, replace the power supply.

How to check the damage to power supply
2. Power supply is weak (resulting voltage power supply can not turn on the computer or the voltage is less)
The characteristics of damage to the processor

Normal fan without processor

Normal fan with processor


Based on experience, the possibility of damage processors is very small. To check for damage to the processor, install the processor to another computer (for comparison).


The characteristics of main-board damage
Because the new main-board, so the possibility of the main-board damage, very small. The characteristics of damage to the main-board, when the power button is pressed
1. Power supply fan not spinning
2. Processor fan is not spinning
3. Casing lamp is not lit
4. Main-board lamp does not light



The characteristics of the memory damage or dirty memory
1. The characteristics of normal memory, but installation is not correct or dirty

When the computer is turned on, the sound


Solution

10_24_2011_1_10_37_am.jpg

Picture a
Release Memory

Picture b
Clean the memory slots with a brush

Picture c
Clean the gold layer memory with a pencil eraser

Picture d
Reinstall the memory correctly


The characteristics of damage to video cards


Solution, remove the video card, clean the gold layer with a pencil eraser.

I hope this information helps.

Oct 23, 2011 | Computers & Internet

1 Answer

I Have A HP Pavilion a6300f And When I Cut It On I Get Nothing From The Video Port Nothing Pop Up On The Screen No Picture The Screen Stay Black As If The Monitor Never Cut On. The Monitor Works I Have...


Sounds to me like you're having one of two possible problems, first possibility is the video card burned out, second being the power supply died out. When you turn on your computer do you hear your harddrive make any sound(usually hear a bit of a louder sound similar to when you first put a cd in the disk drive) if not then it might be your power supply died out, if everything sounds normal then it might just be the video card. There are ways to swap out those pieces, but wouldn't recommend it to you if you're not too tech savvy, so what I suggest is you send it back to HP if you're still under warranty and see if they fix the issue for you.

If you are willing to try and fix it yourself you can order a power supply and/or video card from websites like www.tigerdirect.com or www.newegg.com, and to learn how to replace the parts go here(for video card)http://www.youtube.com/watch?v=Lh_rwIbVNrQ and for the power supply go here http://www.youtube.com/watch?v=UzolRkN7Eew

May 03, 2011 | HP Pavilion Desktop a6300f Intel Pentium...

1 Answer

The pc turns on but no image on screen sometimes,have changed memory modules.its seeing well you restart it and then no image,but pc is on


For a desktop, first try the monitor on another computer, preferably with a different video cable. If it doesn't show a picture; the fault is probably at the monitor. Also try a different monitor on the Gateway.

If these two tests show that the monitor is bad, replace it to use your computer for now. (If it is under warranty, consider warranty repair. Otherwise we can try to diagnose the problem. (Common problems for an LCD monitor are the power supply, the backlight, the backlight inverter or the main board itself. The inverter is the easiest part to replace and can be tested with an oscilliscope or a multi-meter that can measure several thousand Hz.)

If you get a picture, try the monitor on the first computer with the second video cable to rule out a bad cable.

If there is still no picture, the next step is to determine if the computer has a video card installed or if you are using the on-board video. Many computers have both so try plugging the monitor into the other ports if there are any. (The on-board video is disabled when you have a video card in place. When reconnecting the cables, it can be easy to plug into the wrong spot.) Check if the monitor is working.

Replace the video card with one appropriate for your computer (you will need the specs for your computer's PSU (original specs - 300W) and card slot (PCIe x16)). You need a card that doesn't require more power than the power supply can put out. (Remember the CPU and other components need power too. Card specs will include the recommended minimum power supply needed to run the card.)

If you can, get a card that matches the existing video card. This will avoid a major problem. You need to uninstall the current video card drivers to put in a new one. You can try booting into Safe Mode by pressing F8 as you power up the computer. (This can take several tries to catch the point where the computer looks for the keystroke. You only have a few seconds.)

If you have been using the on-board graphics, get a video card. You will need to press a key (F1 or F2 for most Gateways) to enter the BIOS then disable the on-board graphics when you install the new card.

I hope this helps.

Cindy Wells

Mar 30, 2011 | Gateway GT5438 PC Desktop

3 Answers

I have a va703b monitor that when turned on immediately displays NO SIGNAL then the green light turns to orange and the screen goes black. What's the problem?


That is usually a sign of a video problem, but first you should try to use your current monitor on another computer to see if it works there and/or try to use a different monitor on your computer. If your current monitor does not work on another computer and a different monitor DOES work on YOUR computer, then your monitor is broken and needs to be replaced (I will be utterly shocked if it's the monitor though).

Anyhow, going on the assumption that it's a video issue, Turn off the computer and unplug it from the wall and unplug the monitor from the computer. Now open up the computer tower. There are two things that you can try that won't require you to buy new hardware.

1.) Remove the video card (if you have one) and blow out all of the dust in the computer and off the video card. Look the video card over for any blown capacitors or any melted silicone (it will be obvious what you're looking for IF it's there). Put the video card back in, close the computer and plug it back into the wall and plug the monitor back into the computer and try to start the computer.

2.) You can remove the video card, blow all the dust out, and remove the CMOS battery (It looks like a shiny nickel that is sitting in your motherboard) for a minute or so. HOWEVER, if you do this, your BIOS will go back to it's default setup, which is fine if you never changed anything. Put the Video card back in, put the CMOS battery back in, close the computer, plug the computer back into the wall and the monitor back into the computer.
-------------- If you removed the CMOS battery AND you now have video, you're going to have to go into BIOS (setup) and change the date to the current date and time. (when your computer starts up, you'll see on the screen something like "PRESS DELETE TO ENTER SETUP" at that point press the delete key, or whatever key it says to press and you'll enter BIOS)

If you're still not having any luck, then your best bet is going to be to change out the video card with a compatible video card that you know is in working condition and if that works, then that means you will need to purchase a new video card because your current one is broken.

Dec 16, 2010 | Computers & Internet

2 Answers

MASH THE BUTTON AND ONLY THE FAN COMES ON AND IT STAYS ON.NO LIGHT COME ON THE COMPUTER,NOTHING WORKS BUT THE FAN


IT LOOKS LIKE YOU MASHED THE CAPS LOCK BUTTON ALSO. I FEEL SORRY FOR YOUR COMPUTER. LOL!

It is a little misleading but frequently a failing power supply will still have enough power to spin the fan and turn on the lights.

A computer store should be able to replace it for you. Considering your "MASHING" approach to to this problem I highly recommend this approach.

However, if you are comfortable with a screw driver you can replace it yourself. The key is making sure the new power supply has all of the same connectors and equal or greater wattage. The more wattage the better, especially if you have added a 2nd hard drive or a powered video card) Google "replace power supply" and you will find all the help you need. I recommend NewEgg.com for finding the correct PS and the best price.

PLEASE VOTE FOR MY SOLUTION IF IT HELPS :)

Oct 27, 2010 | Gateway GT5220 PC Desktop

1 Answer

I turn computer on i hear it coming on but no picture screen stays black


This might be a sign of a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Aug 26, 2010 | Computers & Internet

1 Answer

Black screen


How old is the computer? Make sure that the power light comes onto the monitor when you plug it in, should be orange and then turn green when video card syncs with it when PC is turned on. If you are getting black screen when PC is powered on:
1. Bad video card
2. Bad video cable
3. Bad monitor
1Solution: Try using a different monitor attached to this same PC and see if it works. If it does, then its the monitor, its cable, or its power supply. If it doesn't work, then its the video card or the video cable coming from monitor.

Nov 24, 2007 | Daewoo L700C 17" Flat Panel LCD Monitor

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