Display doesnt turn on and wont boot up

My laptop suddenly died in the morning. The fan, dvd evrything else are on. I hook up external display and it is still all black. My suspect is display adapter gone bad. Is it woryh it to get new display adapter? I been wanting to upgrade my graphic. I heard m1530 use mx2 display socket which mean can be upgraded? My xps use nvidia 8600m gt w/ 256ddr2. I want to upgrade atleast ddr3 or ddr5 video card.