Compaq V3424au that has a blank screen on startup with all lights
I have compaq V3424au that has a blank screen on startup with all lights coming on,no error messages, no beep sounds, but it does not boot up. display does not come on till i take off the battery for some time and than tunr it back on. is it a problem with power supply that some capacitor in motherboard not able to discharge properly. ? please tell if there is any solution to it.
An expert who has achieved level 3 by getting 1000 points
An expert that got 20 achievements.
An expert that got 10 achievements.
An expert that got 5 achievements.
Re: compaq V3424au that has a blank screen on startup...
You could have a defective LCD screen, If the laptop appears to be booting up and running and the hard disk is spinning and the hard disk LED light is flashing but the screen is dark then, to determine if you have a LCD screen or video card problem, read this and follow these instructions. Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp. Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case. The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills. Check out www.lcdparts.net for parts, repair service and DIY info.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Here are the beep codes for the Thinkpad:" Continuous beeping System board failure One beep; Unreadable, blank or flashing LCD LCD connector problem; LCD backlight inverter failure; video adapter faulty; LCD assembly faulty; System board failure; power supply failure One beep; Message "Unable to access boot source" Boot device failure; system board failureOne long, two short beeps System board failure; Video adapter problem; LCD assembly failureOne long, four short beeps Low battery voltage One beep every second Low battery voltage Two short beeps with error codes POST error message Two short beeps System board failure.
When you press the Power button to start the boot process, the LED lights glow while the computer verifies that there is sufficient electrical power to activate the hardware.
& Solution: When you press the power button, the LED lights on the
computer do not glow or the LEDs blink briefly and then stop. There is
no sound of the fan or hard drive spinning, and the screen remains
blank. The computer will not start if there is insufficient battery or AC adapter power.
The BIOS queries various hardware components used for the startup boot process.
& Solution: When you press the power button, the LEDs glow but
there is no fan or hard drive sound. The LEDs may glow briefly and then
The LED lights blink, stop, and then blink a
second or third time, but there is no sound from the computer and the
screen remains blank. The sequence of the blinking lights indicates a
specific error code.
A series of beeping tones is heard. The sequence of beeping tones indicate a specific error code.
a hardware component has recently been replaced, or if the PC has been
jarred or shaken, there may be a loose connection to the memory chips
or hard drive which prevents the computer from starting.
The BIOS loads the basic input (keyboard) and output (advanced LEDs / display screen / boot drives) devices into memory.
& Solution: When you press the power button, the LEDs glow, the fan
or hard drive sounds, are heard, but then the boot process stops and a
black screen - with an error message - displays.
The boot check has detected a communication error or conflict with a hardware component that must be corrected.
The BIOS loads the Windows operating system and starts the services
that allow low-level control of all of the background operations.
& Solution: When you press the power button, the LEDs glow, the fan
or hard drive sounds, are heard, the HP or Compaq Logo displays on a
black screen, but then the boot process stops and a blue screen - with
an error message - displays.
The boot check has detected a hardware driver error or a software conflict that must be corrected.
Control is transferred to the Windows loader to initiate the display of the advanced settings in the Windows environment.
The Windows logo displays during this step.
& Solution: When you press the power button, the computer performs
all the steps in the boot process, but after the Windows Logo displays,
the moving Windows progress bar or the rotating cursor stops moving and
the boot process stops.
An error message may display on a screen with the Windows logo. In some instances, there is no specific error message.
A black screen appears and the computer attempts to restart.
The Windows self-check has detected a software conflict that must be corrected.
Here and here are a couple of links from HP that may help. And here's a great article for troubleshooting startup problems in general. Also helpful may be links at this site.
I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread. If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!
Make a note of the number of beeps and whether they are long or short. Put the old video card back in the machine. Go online and do a search for "bios beep codes", check what you wrote down and see what the problem was. It was probably a video error. Perhaps you should install the video drivers for your new card before you install it, that way it might avoid the error on startup.
This problem is due to the mix of registered and unregistered DIMMs.
64Mb and 128 Mb DIMM's are unregistered memory technology 256MB is
registered memory technology. A mix of registered and unregistered
memory prevents the server from completing startup, and results in an
error beep sequence and a blank screen..Use registered memory and it will be fine..