Pavilion dv7-4285dx: cannot BOOT/POST/VGA external and internal LCD is dead (cracked)

I cracked the screen of my HP Pavilion dv7-4285dx so bad that I can't read anything on the subject. I'm trying to start to an external monitor to the VGA port, but never to get a signal.

I tried the key switch monitor, but that does nothing. I tried to unplug the LCD internal of the motherboard - not different. I tried a CMOS reset by removing the laptop battery, remove the CMOS battery, cut the power and hold the power button / stop for > 1 minute, then by restarting with external LCD just attached, but STILL no video on the VGA port.

The video card is OK, because it starts with Windows and then I have the video on the external monitor.

Although it is good that I can use the monitor to post once Windows starts, I need to have the video when the BIOS starts to change.

Does anyone have another suggestion how I can get the BIOS to detect and display external VGA at boot time?

Hello Todd_in_LA,

Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the Forums of HP, I would like to draw your attention to the Guide of the Forums HP first time here? Learn how to publish and more.

I read your post about how you try to start on an external monitor, and I would be happy to guide you to a resolution!

Based on the information provided in your post, I recommend you contact our technical support at the 1-800-474-6836. If you do not live in the United States / Canada region please click the link below to get help from your region number.

http://www.HP.com/cgi-bin/hpsupport/index.pl

I hope this helps!

Concerning

Tags: Notebooks

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