Hi. I'm Steve. I'm sorry to hear about your TV. I will try my best to give you a precise and accurate answer.
Can you check that again please. You say the Timer and Lamp LEDs are flashing when the set shuts down but the Temp light is solid?
I thought so. You need a new lamp.
The lamp does not have a filament - it is an arc lamp which is why it works sometimes.
Here is the lamp: http://www.amazon.com/Samsung-HL-S4266W-HLS4266W-Housing-BP96-01472A/dp/tags-on-product/B002Y0TVO0
Replacement takes a couple of minutes as you are aware if you have reseated the lamp.
Just ask if you need more help on this issue. I will be here.
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Thanks very much.