I am hooking up my cracked screen Toshiba Satellite L305D-S5928 to a Dell external monitor and on monday it was working perfectly then i moved it a bit to the right then the screen died and went to the "Check Signal Cable" and it didn't fall out but now i can't seem to get it to work again.. i've checked the cable prongs and none of them are bent or broken off and i don't know whats wrong. And just so you know the only time i see the screen and everything would be at start up like, and then when it gets to logging in it goes to check signal cable so..
This is a simple issue which is coming to surface from the display cable that you are using. it should be damaged, try getting another cable and get it connected with it. It will surely work correctly.