I heard a loud pop then the tv turned off

Probable power supply failure...
http://www.shopjimmy.com/megmeet-mlt668tl-vm-power-supply-unit.htm

bad manin bord poped the main power transister we nee dto replace that with spare part .

Check all the electrolytic capacitors at its main power regualtor section circuit. It will be best to replace the power regulator board as card basis.

Hello
Check its power supply regulator board. The pop sound you heard may be due to an explosion to any electrolytic capcitors on it. If the line voltage exceeds, this fault will happen. just repalce the damaged component. It is best to replace this board as card basis.

You may have blown parts, look inside and inspect the power supply module and the back light inverter board, I will leave the TV unplugged.
Please see my basic troubleshooting guide:
http://s807.photobucket.com/home/budm/allalbums

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://en.wikipedia.org/wiki/Capacitor_plague
Parts: try www.shopjimmy.com or Ebay

Sounds like your element wire shorted out on back of unit.Try removing back panel and cheak wire on bake element .MAKE SURE YOU UNPLUG OR TURN OFF BREAKER.Hope this helped you out:)

Ur tv have burns capacitors,look for pop ups caps.

3 times blink shows lamp cover is removed or not installed properly on TV.
Please take out lamp inside TV and check, seems its broken as you heard loud pop.
Thanks.

If you have a Sony DLP, then the loud pop you heard is your lamp.  The lamps last approx. 4K-6K viewing hours.  Read your manual for replacement part number to reorder and very simple to replace yourself.

hello. the loud pop you heard was .maybe a fuse.? u need to uplug .!!! the set !!!. and take off the back and see if fuse is bown.? ok let me know.!! ok