PC Blank after Windows 7 Activation, HELPPPPP!!

[RexxShah]

Hi guys, so last night I activated my Windows 7 Ultimate SP1 , activation was successful but after I restarted my pc, it goes blank,

my monitor goes "No Input to screen bla bla bla.." , checked my cable and its fine (of course).
my cable goes to my graphic card. should I try it direct to mobo?

 

[vrumor]

How did you activate Windows 7?

 

[RexxShah]

How did you activate Windows 7?

remotely by seller.

activate through 3rd option, "via phone", i think.