HP Pavilion dv4 1428dx black screen/will not start up

[Agustin]

I'm having problems with my laptop (HP Pavilion dv4 1428dx) the last thing I did was put it to sleep, then cameback and tried to wake it up but it would not start up. All the lights are on, but the screen is black and the only thing I hear is the fan moving. The caps lock and num lock keys have a blinking light, not really sure what that means. The power LED is on, the battery LED is on, but the hard drive LED is not on. This computer is almost 3 years old and I have never had a major problem like this until recently. If anyone has any solutions I would gladly appreciate them. 

Thank you for your time,

Freshman4002

[DavidPK]

Hi,

Try the following.

Shutdown the notebook ( if you have to, just hold down the power button until it turns off ), remove the AC Adapter and remove the battery. Now hold down the Power Button on the notebook for a full minute. Re-insert the battery, plug in the AC Adapter and see if the notebook will start.  If it does and you get a video output, you will almost certainly get a screen telling Windows didn't shutdown correctly - use the arrow keys to select 'Start windows normally' and hit enter.

Regards,

DP-K

[Agustin]

Thanks David for replying, I tried what you told me but I'm still getting the same problem. The computer tries to turn on, LEDs are all on except the screen and the fan is on. I don't hear any hard drive or anything else starting up, I just get a black screen and the lights near the caps lock and num lock are blinkng.

[DavidPK]

Hi,

If there is a repetitive sequence to these 'blinks', see if you can match them to the table below.

Regards,

DP-K

[Agustin]

I most positive it's a BIOS corruption failure, based on this chart. I have 2 blinks on the caps and num lock. And both blink at the same time with a 3 second interval in between blinks. Anyway to fix a BIOS corruption failure?

[DavidPK]

Hi,

Follow the procedure starting on Page 69 of your Maintenance & Service Guide to remove the CMOS ( RTC ) battery - leave this battery out for a full hour before reconnecting.

Regards,

DP-K

[Agustin]

By doing this do I lose any information that I have stored on my computer? I will try this and get back to you as soon as possible.
Thanks again!

[DavidPK]

Hi,

No, this will not cause you to lose any data from the Hard Drive.

Regards,

DP-K

[Agustin]

okay I finished taking it out and putting it back in, now do i just start the computer normally?

[DavidPK]

Hi,

Yes, see if the notebook will now start normally.

Regards,

DP-K