lg flatron ips led 27ea53 not supporting hdmi

I bought this monitor and worked fine for couple of weeks, i connected my laptop to LG with hdmi, it was fine so far, but then i bought ps3 and connected it with hdmi to lg and played some games. after that I turned off ps3 and switched the hdmi cabel to my laptop. then suddenly the lg monitor is black and showing nothing, just some broken blinks. with vga, it is working fine but not with hdmi. what can be the problem?