I messed up my display settings on my Dell Inspirion 1525 laptop/screen is blank/need to somehow reset screen

So, I am sitting here for hours now trying to fix a screw up I made when I was changing settings to make the display resolution better on the plasma tv screen for my kids.

 I have a Dell Inspirion 1525 that I downloaded all kinds of programs for homeschooling my kids with and I hooked it up to my new plasma tv which is an LG, 42 inch screen.  I used a HDMI cable.  It did not look great so I started "messing around with settings".  I got into display settings and SCREEN RESOLUTION, made a bunch of changes and it looked great.  Then I restarted the laptop because it told me to and now neither the laptop or the plasma shows anything on the screen.  
 
Here is the kicker, I ran system diagnostics on the laptop and during that process EVERYTHING SHOWED UP WONDERFULLY, I could switch between the laptop screen and the plasma by hitting Fn F8, but now it is back to what it was, the TV does not even acknowledge an input from the HDMI cable.  
 
When I restart the laptop (which I have done many times) it shows me the blue bar and I can get into safe mode but then it says Loading windows files please wait ................... and it just sits there and does nothing for a long time.  I have tried this multiple times.
 
When I restart it after waiting awhile it just goes blank except I can see a line blinking up on the left hand corner.
 
WHAT STEPS DO I TAKE?  I need a step by step explanation of what to do.  My email is nick@tl4j.com.  

If I go start normally, I get the windows sound and it says starting windows
and then it goes blank.  I have been all over the web looking for solutions
and the jist of it is that I fucked up my display settings/screen
resolution, I was changing it, again it was all great until I restarted the
laptop which leads me to believe I changed a driver or something.

I don't have any disks here, we just lost a newborn baby, I am in Costa Rica and trying to get back to life and homeschooling my older kids, I don't want to lose all the programs I put on this
laptop for homeschooling,

this is a mess.  I really need help.  

Nick
rowleylawAsked:
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SyncromindCommented:
you might try pressing the functino key and f4 or f5 which is the change display keyb. Once you get image, you need to unninstall the video card from device manager.
go to start,run,type "devmgmt.msc" and remove the display adapter,then reboot and it should auto detect again.

hope it helps.

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rowleylawAuthor Commented:
solved the problem myself
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