I just cleaned a Inspiron 1545 laptop my sister has and the fan started and everything booted up normal but the screen. It boots up for about 10 seconds then shuts off. I have checked the ram and processor but nothing changed. I also checked all the connections but still nothing. While I cleaned it I tried to change the disk drive but I put the old one back in and the boot up still just had a black screen. I tried discharging the static 5 times and hooking it up to another screen but nothing. Could the screen have just died. According to my sister it's about 10 years old. Please help