Mini displayport to VGA not working anymore

Hello Everyone,
Macbook Pro 10.9.5 Mavericks
Mini displayport to VGA adapter to beamer
I recently bought a mini displayport to VGA adapter cable to use my beamer as an extra display.
The first 24 hours it worked and I could use the beamer as an external display which was great.
Only the next day it wasn't working and the beamer kept saying NO INPUT. My roommate has a windows laptop with VGA port and it still works on his laptop (before the incident and after).
I used the same cable only with the mini displayport to vga adapter inbetween it.
I tried everything to solve it.
     - Go to display and look for external desktop of mirroring (this didn't work because my macbook doesn't recognize it)
     - I did a PRAM reset
     - Did a SMC reset.
     - Tried the same thing on another beamer and it didn't work. With my roommate (his laptop) everything just works.
     - and finally i bought another more expensive Apple mini displayport to VGA adapter and it didn't work also
     - I repeated al the previous steps with the new adapter (PRAM, SMC, DIFFERENT BEAMER, DIFFERENT CABLE)
Still it doesn't work.
I really don't know what to do now. I just worked the first day and know my macbook doesn't even recognize it. doesn't matter which of the 2 ports (on my macbook) I use.
I hope there's is someone with a solution because I just don't understand why it's not working or ignoring my cable.
MacBook Pro (Retina, 15-inch, Late 2013), OS X Mavericks (10.9.5)

This is the Mac Pro desktop forum. I requested your post be moved to the MacBook Pro laptop forum.

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