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In Topic: Vga Port On A Laptop Not Working
2012-05-23 13:03:44
Prichard, on 2012-05-21 14:58:24, said:
@Digitalbanana: I seriously doubt that your laptop VGA is at fault since you said "...this laptop is new high end model, under warranty ...".
Although I don't know details about your external screen (TV or computer montor model) but you may try to play around with these procedures:
If you haven't done it already (assuming you have Win7): 1. Set Win7 Power Options to the following values: Turn off display = Never; Computer Sleep = Never; Closing the lid = Do nothing. 2. turn off your external display, power off your laptop and close down your laptop lid. 3. Keep the laptop lid closed, turn on your external display then power on your laptop. You should have your external screen working. Note that it takes awhile to see anything on the external screen - probably when Win7 is loading if you don't set your BIOS to see the POST messages. If all is well, you can then set the resolution to the max resolution (native resolution) of your external display using either your graphics card option or Win7 Display option. (mine set to 1920x1080 for the 32" Sony TV).
Note that I run my system 24/7 and I turn off my TV screen as needed.
Also another thought: If your external monitor has 2 inputs (DVI-D and VGA), what is the default input on your external monitor? I have 2 additional monitors with those 2 inputs and, when connecting with one of my desktop systems (with same 2 outputs), one of them is giving me a terrible time connceting using VGA while the other never gives me problem because it has "a switch" to select its source. You may need to check your external display connection option (DVI-D or VGA).
I wish I can be at your place to fool around with these discrepancies. Good luck on your effort. Cheers.
Although I don't know details about your external screen (TV or computer montor model) but you may try to play around with these procedures:
If you haven't done it already (assuming you have Win7): 1. Set Win7 Power Options to the following values: Turn off display = Never; Computer Sleep = Never; Closing the lid = Do nothing. 2. turn off your external display, power off your laptop and close down your laptop lid. 3. Keep the laptop lid closed, turn on your external display then power on your laptop. You should have your external screen working. Note that it takes awhile to see anything on the external screen - probably when Win7 is loading if you don't set your BIOS to see the POST messages. If all is well, you can then set the resolution to the max resolution (native resolution) of your external display using either your graphics card option or Win7 Display option. (mine set to 1920x1080 for the 32" Sony TV).
Note that I run my system 24/7 and I turn off my TV screen as needed.
Also another thought: If your external monitor has 2 inputs (DVI-D and VGA), what is the default input on your external monitor? I have 2 additional monitors with those 2 inputs and, when connecting with one of my desktop systems (with same 2 outputs), one of them is giving me a terrible time connceting using VGA while the other never gives me problem because it has "a switch" to select its source. You may need to check your external display connection option (DVI-D or VGA).
I wish I can be at your place to fool around with these discrepancies. Good luck on your effort. Cheers.
Tried the power settings options to no avail, thanks for ideas. Most of my external monitors have VGA or DVI-D. I have set monitors to use VGA not auto or DVI-D as my laptop doesn't have DVI-D. The laptop has VGA (does not work now), HDMI (works ok) and Displayport output for video - the Displayport has never been tested as don't have a monitor with it!.
In Topic: Vga Port On A Laptop Not Working
2012-05-23 11:39:14
astral, on 2012-05-21 12:39:45, said:
If the external display is plugged in at boot time,
there is a good chance that the OS will detect it automatically.
there is a good chance that the OS will detect it automatically.
Yes, O/S detects it ok on Screen Resolution options. Just cannot seem to power on the actual external screen. HP suggest I do a complete factory system restore. Will try next month.
In Topic: Vga Port On A Laptop Not Working
2012-05-23 11:37:48
welo, on 2012-05-21 12:43:28, said:
If the screen is attached at boot time than the Bios (=firmware of the motherboard/graphics chipset) will detect it and enable the signal on the VGA port. If you attach it at a later point then the (Windows) software driver is responsible for enabling the VGA port.
The goal is to find out if the hardware in your laptop is broken, or if it is merely a software (driver) issue.
If the VGA port is enabled during boot time then you know that the hardware is working.
But the reverse conclusion is not necessarily true because different laptops handle the VGA port in different ways. Meaning, if your screen is not enabled when an external screen is connected at boot time, it does not necessarily mean that you have a hardware problem.
Does that make sense?
The goal is to find out if the hardware in your laptop is broken, or if it is merely a software (driver) issue.
If the VGA port is enabled during boot time then you know that the hardware is working.
But the reverse conclusion is not necessarily true because different laptops handle the VGA port in different ways. Meaning, if your screen is not enabled when an external screen is connected at boot time, it does not necessarily mean that you have a hardware problem.
Does that make sense?
Thanks for that, makes sense. I cannot get the screens to come on so I am thinking on rolling back BIOS to earlier date to see if that helps. Will try next month as no time now.
