I'm sorry to hear you're having this issue.
I would recommend calling 800-SAMSUNG and having a warranty repair scheduled for that.
Keep me posted!
i bought a Samsung LN40A530 lcd tv in December 2008. I was wathcing tv tonight and it just shut off. There is no standby light and I can't get it to turn back on. I have no video or audio. I disconnected it from the surge protector and tried it straight into the wall outlet to no avail. After leaving it unplugged for about 20 - 30 minutes I get a blinking standby light but it still will not power on. Any suggestions?