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Have you tried to run diagnostics at boot-up?
Have you tried to test with a known good graphics card?
Have you tried testing with another known good monitor?
Other issues would be corrupt video driver(s).
Do you have a rotating monitor? There are a few that can be rotated 90 degrees in the plane of the screen for a "portrait view" instead of the standard landscape view, and they will automatically swap horizontal and vertical signals as needed. If you have one of these, the position detector switch is stuck in the wrong position. You may be able to get it unstuck by rotating to the other position and back again.
There are some programs (e. g., Acrobat Reader) that let you rotate the view of the file you have open, but that only affects the contents of the window, not everything on the screen. I'm not aware of a program that rotates the full screen view for the entire system.
generally in pc desktop this problem happen
the cause that no video , it is because one of your IC integrated circuit
there are two types of integrated circuit
horizontal and vertical
if you are a repair men then open your monitor and check it .
IC cost you 10$.
replace it with new one.
hope this help you
if not we can go furthur to fix your problem.
Wow thats strange? check to see if there is a Function key ( Fn on Fun ) and look at the F keys at the top of the key board. One may have come on when dropped. Hold down Fn key then push the F key. Hope this helps.
Most likely you do not have enough video memory - that will definitely slow everything down when you switch to an LCD monitor. If you have a video card, your best bet would be to get a better one. If the video chip is on the motherboard (the connector will be vertical instead of horizontal on a tower), it might be possible to increase the memory because it uses some of the system RAM.