TV Repair Questions? Ask a TV Technician for Answers ASAP
When the red light starts blinking, how many times does it blink before it pauses and starts blinking again?
Then most likely what you have is either a new defective lamp (not likely, but possible), or the lamp power supply is defective.
By the way, blinking in 3 flash intervals means the lamp door isn't closed securely, but it looks like you don't have that problem anymore.
Are you at all handy with electronics, have a voltmeter, and would be comfortable taking the back off of the set? If so, I might be able to help you figure this out.
If not, then of course you're going to need a tech to help you.
Let me know if you'd like to try, and thanks for using JustAnswer!