Question about Compaq Evo D510 Minitower (Open Box) (OB4700432011) PC Desktop

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Help me it turns on , **** nothing shows up on the monitor and red light shown

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  • Compaq Master
  • 27,725 Answers

Test your PSU power supply unit or replace it if your power supply units fan is not working your PSU is faulty
http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm

Testing & replacing the PC's power supply
http://www.youtube.com/watch?v=hbNxhvm0czs

WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.
http://www.kitchentablecomputers.com/static.php - rules

Test all power and data leads that attach to your hard drive IDE,SATA
the leads from your (motherboard to your hard drive) make sure they have secure dust free connections and are not faulty

if its a 40 pin flat ribbon type it will be the first to fail

make sure all leads that are attached to your drives dvd\cd and floppy have secure connections and are not faulty

even something as small as a faulty electrical fan and its lead can cause you problems
computers need all power and data to continue through every working device and to have an end so any faulty leads will end up with a computer error

Check your RAM.
The RAM is located in the middle of the motherboard.

There are tabs that you can push to release the RAM.
Remove it and put it back in place until the tabs pop out.

Loose RAM can cause your computer not to start properly where you want to see a video signal.
Remove the memory modules from their slots.
Take the opportunity to clean the slots on the motherboards and the memory module connectors.


Use compressed air to blow dust away and clean contacts with a soft cloth.
Do not use a metallic vacuum cleaner if it touches any component it may create a short and cause damage to the motherboard or other components.


Do not use solvent that may attract dust and never poke things like cotton buds in to slots, lightly rub alcohol (Methylated Spirits) on a cloth not to hard let the alcohol do the work on the copper gold or silver tabs and r


Allow the pins to dry.
They will air dry in a matter of minutes.


If reseating the memory did not resolve the issue try swapping the location of the memory. Make sure your graphics card is securely seated with no dust built up or in the socket
if you remove your graphics check the socket to make sure its dust free

Restart your computer then reinstall it this should activate found new hardware wizard

Check the vga lead for secure dust free connection or try another vga lead.

Posted on Apr 15, 2014

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  • Contributor
  • 20 Answers

Red light on the box or monitor? Any sign of a beep when the PC starts (Called a POST, confirming the the machine motherboard is at least operational). If not, I'd start with replacing the RAM and go from there. If nothing is coming on the monitor and their is no noise from the box, either your motherboard, graphics, CPU or memory is faulty.

Posted on Apr 14, 2014

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1 Answer

Monitor flashes logo and then turns black.with red lights on


Here's some tricks I would try. Something here, might help...
1. Verify the monitor's power cord is plugged firmly into the wall outlet and the back of the monitor.
2. Verify the monitor cable is firmly connected to the computer and the monitor.
3. Verify that you have turned the monitor power switch on.
4. If the power light on the monitor is not on, test the wall outlet (plug in a light or something you know works).
5. If the power light on the monitor is not on, try a different power cord.
6. If the power light is on and yellow or orange or flashing, but nothing displays, or the display is incorrect, borrow a monitor from a friend. If that works, your monitor probably needs replaced.
7. Also, you could try your monitor on a friend's computer. If it doesn't work, your monitor probably needs replaced. If it works properly on your friends computer, the problem may be with your computers video output port, motherboard video chip (or video card, if you have one), or drivers.
Good luck.

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Monitor will not turn on


Monitor will not turn on as in NO Power? When you hit the Power Button the monitor power light does not come on? If so either the power cord is not plugged in good, maybe the outlet you have it plugged into the wall or power strip is not working, or the Monitor is bad and needs to be replaced.

If you are saying the monitor has power but the display is black then:
Look to see if it sounds like the computer is running but nothing is shown on the screen. If so try this:

Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad. If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.

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Computer turns on, but nothing is shown on screen


If your PC turn on but there is no display, It may be your Graphic card or your memory.

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What does the red light mean next to the power button?


The red light next to the power button is usuall the hard drive led which should blink every time the hard drive is in use, there is normally a green or yellow light for the power that shoukld stay on constant when the computer is on.

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1 Answer

The green light turned red and now it green light


Dear,
Just disconnect the monitor data cable from PC and see, any cable discunnection message comes in Monotor. If that comes in monitor, there is no issue with it

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1 Answer

Flashing light nothing else


Doesn't sound like a virus. Sounds like a fuse or something else is out. A red light isn't good. If the monitor is ok you get an amber light. I would suggest this monitor is gone. Sorry.

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1 Answer

Thier is the red light that is shown instead of green


You have a problem with your hardware. This happens to about 30% of xbox's over time. It is called the red ring of death. You need to reflow the solder under the GPU chip to fix it, find an xbox repair place on ebay.com

Mar 23, 2009 | Computers & Internet

1 Answer

Monitor not turn on when hooked up to power supply only


Hi...there,
The AC Adapter supposed to lite GREEN not red... Try a different AC Adapter if you got one..
If it still the same problem after changed another AC Adapter... Then it's your backlight inverter are busted. Need to replaced a new one or returned...

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1 Answer

Nothing appears in the monitor


Try to check your hardware in your computer maybe it loose.try to insert properly the processor or other parts of your computer

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