Question about HP Compaq Presario 6430NX (DA237A#ABA) PC Desktop

3 Answers

Install new power supply?

My daughter's computer will not power up at all. Her monitor has a message that says: No signal. Do I just need to go ahead and buy her another power supply or is there something else I can do?

Posted by on

  • Gloria Loring Jul 06, 2007

    When we push the power on button there is nothing. No flashing lights, fans, beeping sounds... nothing. Operating system is the Windows XP Home Edition



3 Answers

Thanks for comments. I will try plugging in power cord direct to wall socket. You were right - It's about five years old. Think I will be willing to invest the $40 in the power supply first, then if that doesn't work guess I know what she's getting for going back to school gift Fall semester!

Posted on Jul 06, 2007


  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 624 Answers

The no signal message on the monitor just indicates that it isn?t detecting a video signal from the PC. Could be a lot of simple things so I wouldn?t give up on it just yet. 1)Is the computer actually on? 2)What LEDs on the box are on or flashing? 3)Can you hear any noise, beeping, fans, anything? Let us know that plus what operating system and any other pertinent information and we?ll pickup from there.

Posted on Jul 06, 2007

  • 1 more comment 
  • Anonymous Jul 06, 2007

    The first thing to check is to plug the power cord from the computer box directly into a working wall socket.

    Some Compaq?s have a separate power rocker switch on the back; if you have one it should be on ?1? for on.

    If that isn?t it the next thing is to try another power cord if you have one.

    If those don?t work then the next step depends on how much more effort/money you are willing to put into a five+ year old PC. The leading candidates are going to be power supply, power switch or motherboard so even if we guess right the first time you are going to spend at least $40+ on a power supply. When you consider a new PC can be had for $400 and up you should at lest consider your options before proceeding.

    Let us know.

  • Anonymous Jul 06, 2007

    How old is your PC? My first search said that model had a P2 orP3 processor, however, another said it is fairly recent. If it is relatively new my apologies for suggesting you consider scraping it. Let me know.....

  • Anonymous Jul 07, 2007

    For anyone trying Pastorn's power supply test please exercise caution. Shocks, even low voltage ones, are not pleasant and sometimes dangerous.

    As an alternative for $10 or $15 you can pick up an inexpensive power supply tester at CompUSA or BestBuy. In fact if you take your old power supply to your local computer repair shop they may even be willing to do a quick test for free if you buy the replacement there.



  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 98 Answers

The monitor is not receiving any signal from the PC. When you push the power button ON, is there any activity on the PC (LEDs on, power supply fan, etc) or it's just dead ? In this case, yes, the first thing to check is the power supply.

Posted on Jul 06, 2007

  • Marcelo Pastorino
    Marcelo Pastorino Jul 06, 2007

    If you want to go one step further, check the power supply. On some power supplies, specially ATX style, you can test it by unplugging everything from it, short the green and any of the black cables with a paper clip, and then plug it to the wall and turn it on with the switch. The fan should come on if the power supply is OK.


1 Suggested Answer


6ya staff

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Acer flat screen monitor

acer monitor v193hqv power supply regulater ic burn so iwant circuit or ic no part no ic 802 problem plse solution

May 03, 2013 | Acer S202HL LCD Monitor

1 Answer

Why does my computer say no imput signal

If you have used a desktop computer or have a dual-monitor setup, you have likely seen the "No-input Signal" error message on your computer monitor. The error message may point to a number of culprits. Accordingly, the solutions run from simple to complex. Prior to attempting advanced troubleshooting methods, check the connection first. Power off the computer and the monitor. Remove the cable that connects the monitor with the computer, then reseat it. Try a different port, if possible, then reboot the computer.
Connect the monitor to another computer if possible to eliminate the monitor as the faulty hardware. Shut down the computer. WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. - rules Only work inside the computer case when the power has been switched off and disconnected. Never open the power source. Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards Remove all cables and devices plugged into the computer. Make a note of the port into which your monitor is plugged. Remove the left side panel when facing the front of the case. Unscrew screws or manipulate latches to remove the side panel. This process varies according to the type of case you have. Please consult your manual if you are unsure of how to remove the side panel. Attach the antistatic wrist bracelet's clip to a metal object, then ******** the bracelet. Locate your video card. (This will be the card that contains the port with which your monitor interfaces.) Remove the slot cover screw that secures the card into the slot. Remove any power cables that connect the video card to the power supply. Pull the card out of the slot. Examine the gold pins to check for any damage. Reseat the card if it physically appears to be undamaged. You should hear a click once the card is secure in the slot. Screw in the slot cover screw. Attach the power cable from the power supply unit, if applicable. Leave the case open for now. Reconnect only the monitor, power cable and any devices required to boot the computer, then restart the computer. Shut down the computer again if you receive the "No-input Signal" error message again. Remove any cables and devices you plugged in to restart the machine. Remove the video card with a spare or replacement by following the instructions above. Connect necessary cables and devices to reboot the computer, then restart it. Shut down the computer and remove cables and devices if the display still won't work. Unplug the power supply's cables from all devices on the motherboard. Make a note of each plug-in so that you can correctly connect all devices with the new power supply. Remove the screws that mount the power supply. Fit the new power supply into the mounting area, and screw in all screws. Attach all required power cables to devices connected to the motherboard. Attach the cables and devices required to start the computer. Reboot. Hope this helps.

Dec 07, 2012 | Computers & Internet

3 Answers

Acer ASpire M1100 shows No Signal on monitor

Any time a monitor says "no signal" that message is originating from the monitor itself, and not from the computer. A monitor in a room by itself with no computer will say "no signal" for a brief time, if it is turned on. So, if you have tried other monitors also with no luck, then the problem is either the video adapter of the computer, or something that is keeping the computer from booting in the first place (power supply, hard drive, memory, motherboard). A power supply can be tested with an inexpensive tool. Everything else needs either a swap out with a known good stand-in, or else an expensive tool to know if it works.Does the fan come on when you turn the computer on? If so, maybe more likely to be the motherboard, hard disk, or memory. If not, more likely to be the power supply.

Feb 02, 2012 | Computers & Internet

1 Answer

When i start the computer and the monitor it says dvi no signal

How is the monitor hooked up? Are you using the SVGA plug (blue center with 15 pins) or the DVI (white with a lot of pins)?

Either way, if your monitor says there is no signal, then it means your computer is not putting out a video signal. Depending on you computer, this could mean 1)bad power supply 2)bad video card, 3)loose cable connection.
You'll need to check all three. Since the monitor does display a message, it is probably good.

Jun 17, 2010 | ASUS 90LM3110150102UL Monitor

1 Answer

My samsung 940N acts like a florescent tube, tries to start and doesn't

Use the self test feature.. follow the steps..

1. Turn off both your computer and the monitor.
2. Unplug the video cable from the back of the computer.
3. Turn on the monitor.
If the monitor is functioning properly, you will see a box in the illustration below.
This box appears during normal operation if the video cable becomes disconnected or
4. Turn off your monitor and reconnect the video cable; then turn on both your computer and the
If your monitor screen remains blank after using the previous procedure, check your video
controller and computer system; your monitor is functioning properly.


The Power supply inside the monitor can be hazardous and donot open the monitor while power on.

Donot work with the monitor when it is open and the power supply is on.

If there is something wrong with the input signal, a message appears on the screen or the
screen goes blank although the power indicator LED is still on. The message may indicate
that the monitor is out of scan range or that you need to check the signal cable.

Feb 13, 2010 | Samsung SyncMaster 940N 19 inch LCD...

2 Answers

The moniter went all black and the power button on the moniter is flashing on and off

Please disconnect the monitor from the PC and if still the monitor is blank then monitor is defective because when you disconnect the monitor from the pc you should see a message on the screen about signal like no signal etc..

Jan 29, 2010 | Dell Computers & Internet

1 Answer

I turn on my computer but my monitor says there is no signal

hello, try to unplug the cables on your desktop, then plug it again, sometimes its loose, or sometimes the power supply on your computer is not functioning properly.

Nov 02, 2009 | Computers & Internet

1 Answer

Emachine destop not recognising acer lcd monitor

It sounds more like the computer isn't starting up. The "no signal" message is coming from the monitor itself to tell you it's on but there's nothing coming in to display. Normally no special drivers are required for the monitor, and you'd see at least the computer maker's splash screen and BIOS messages if the computer was starting up properly.

You'll need to determine what is keeping the computer from starting up. Make sure it's getting AC power and that the power light comes on when you press the front panel power button. You may need a power supply. If the computer comes on but doesn't boot you may have memory problems or trouble with the motherboard. But your monitor is working properly.

May 10, 2009 | Microtek C593 15" Flat Panel LCD Monitor

2 Answers


Is the CPU fan running?

Oct 21, 2007 | Computers & Internet

Not finding what you are looking for?
HP Compaq Presario 6430NX (DA237A#ABA) PC Desktop Logo

120 people viewed this question

Ask a Question

Usually answered in minutes!

Top HP Computers & Internet Experts


Level 3 Expert

13434 Answers

Thomas F. Schneider

Level 3 Expert

2715 Answers

Alun Cox

Level 3 Expert

2679 Answers

Are you a HP Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides