Re: Works on external monitor, but not on internal
I think you must to change your LCD SCREEN or you use a crt display.Your motherboard is ok. I've another problem, it's a video display. in Dos mode i have a half of screen and i can't use my laptop under Windows but it's work fine with Linux. I'd like to know if you have the bios for this laptop, i'm looking for this for a long time ! (not found on hp web site). If yes please can you send it to me at this email: [email protected]. Many Thanks,
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This may be a defect in the graphics card, since the external monitor (is it properly connected to the VGA-connector and is the power on?) should be recognized automatically and display instead of the internal monitor. The behaviour of the laptop in case an external monitor is connected can sometimes be controlled via the BIOS, which is impossibile to do if the internal monitor or the graphics card doesn't work. I'm afraid that, if you can't reset the BIOS yourself, this may be a case for the repair service.
Test your laptop with an external monitor and find out if the external video goes bad too. If both, internal and external images go bad, you have a problem with the video card.
If external works fine and only internal goes bad, most likely it’s either bad video cable or LCD screen failure.
Have you tried pressing and holding the "Fn" key and then, while still holding the "Fn" key, press the "F4" key? This toggles between the internal and external displays. There are three settings. The internal LCD only, both internal and external displays at the same time and external display only.
If the notebook's video card (which may be on the motherboard) is successfully displaying images on an external monitor it sounds more like a problem with the notebook display or its connections. Probably the motherboard is OK.
The display properties indicate the hardware is working, so it's likely just a setting.
On HP/Compaq models you will see a picture, usually on the F4 key that looks like a screen with two lines beside it.
You need to hold down the Fn key(bottom left) and then push the F4 key at the same time to cycle between LCD, external or both.
If it is a newer model, a menu will pop up when you do this asking if you want to duplicate the LCD on the external, switch to the external or extend the desktop onto the external. Select the appropriate setting or continue holding down Fn while pressing F4 to cycle between the settings to the one you want.
If you have re-installed the computer at some point with anything other than the factory recovery set this may not work and I will have to give you a longer set of instructions.
If this works please rate this as fixed, if not reply back and indicate what version of windows you're using and I will post the instructions for the "long" way.