Sony Vaio pcg-grt170 Fkeys

ok this laptop is being used with an external monitor.  As of about two weeks ago it was being hooked up with a 13pin cable attached from the back of the laptop to the back of a view sonic lcd flat screen TPF790.   Well now when it is connected this way it will not work.  The windows XP will show on the External desktop when the laptop is rebooted but then after that the screen goes black.  He mentioned that he usually hits the CTRL F7key in order for the external screen to work.  Well not that is not working.  MY question is, where can I get a diagram of the layout of this particular keyboard?  Or can someone tell me which Fkey controls the video display functions and how to use it?  Please get back to me asap this is driving me nuts!! :o)
brantekAsked:
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MarkConnect With a Mentor Commented:
the keystroke is old down [fn]then press the [F7] key each press of the [F7] key will cycle through the screens. (laptop lcd , external , tv and back to laptop lacd
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Justin CollinsIT Support TechnicianCommented:
Try the FN key instead of the CTRL Key.  The right FKey usually has blue label on it and it looks kinda like "  |O|   ".     Only the O is more squarish.
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MarkCommented:
You have the correct key strokes but there is a possibility that it doesn't work if you are using a second user account. It only works with the first user to login.
Why has it been used in this fashion, is there another problem with either the lcd screen or perhaps the video on the laptop? have you tried to attach it to a TV through the video out port next to the double USB ports on the back.Try to toggle the [fn] +[F7] keys with this setup.
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MarkCommented:
Sorry meant to say incorrect keystrokes.
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MarkCommented:
My apologies puter_geek, was typing while you posted.
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brantekAuthor Commented:
the reason he is using an external monitor is because he needs a new inverter.  I ordered on and installed it and it worked for about 5 minutes and then went black again.  I looked at every other possibility.  I figured the inverter I just bought and installed was faulty simply because it did work for 5minutes unless the inverter board is blowing the inverter.   So I am sending the inverter back to sony to be tested.  If they say it is fine then the problem is most likely the inverter board.  It's not the lcd screen or the video cable because I can see the system running when I shine a light on it.  I know it is not the backlight because when I depress the buttons where the lid touches the base the light goes on for a couple of seconds.  Another thing I noticed is that it runs really hot towards the back.  I wonder if this had an affect on the inverter board as well.  But in any case he was able to view the system when he hooked it to the view sonic two weeks ago.  So we verified the desktop lcd is working and the cable is fine as well.  So I thought either the 13pin connection on the back of the laptop or the Fkeys.  

where is the FN key?  do I press the FN and F7 together like i would CTRL F7?
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MarkCommented:
It should be between the ctrl and windows key on the bottom left
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MarkCommented:
sorry-typo--> Hold down the [fn] key
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brantekAuthor Commented:
ok I will try that and get back to you.
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brantekAuthor Commented:
Ok he tried that and said it did nothing.   what else do you suggest?
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MarkCommented:
Have you tried booting in safe mode by hitting the f5 or f8 key on startup. there may be an issue with the video drivers?
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brantekAuthor Commented:
he did reboot but not in safe mode.   if there was a video driver problem I just wonder why it did not surface until yesterday?  It was working fine two weeks ago.  He said all he did was plug it in and fiddle with the keys.  are you suggesting that by starting in safe mode it would somehow reset the drivers or are you suggesting I check the drivers?  If the video drivers were a problem wouldn't that affect the video on the laptop screen.  Even though the screen is black I can still see that the program is working when I use a flashlight.   So what is your reasoning for the safe mode?  Are there any other keys that maybe he could have pressed that may be causing this?
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MarkCommented:
When you mentioned-->The windows XP will show on the External desktop when the laptop is rebooted but then after that the screen goes black<-- usually XP loads standard drivers for the post and then loads the video card drivers when the XP screen is running. Starting in safe mode keeps the driver from loading, but that may also keep the functionality of the external vga port from working.
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brantekAuthor Commented:
Hello all,

I apologize I forgot I left this question open.  I've given the points out.  It's really great having you all there when things get complicated.  

Thanks again
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