TV Model HL72A650C1FXZA
TV Serial: AMBF3CKQB01234B
Came into room while kids were watching TV, and the screen was frozen. Picture was clear. No sound. TV would not turn off by remote or front-pannel stand-by button. Had to pull the plug.
Plugged in and re-started, and the TV screen would not come on. Standby light comes on, then disappears when power button is pressed. Lamp light flashes constantly. No screen picture and no sound. TV will still not turn off by remote or front button. On-board 'channel +/-', 'source', 'vol +/-' buttons do nothing. Had to pull the plug again.
Replaced the bulb with high quality (I think) one at the link below. TV has the same problems even with the new bulb, except that now when the TV turns on, the screen illuminates but stays a flat black/grey colour. Lamp light still flashes constantly. Hardware buttons and remote still do nothing.
I am asking for advice on a way to test what components need to be replaced, or a suggestion on order of components to investigate, as I have little experience with this type of TV. Can anyone help or suggest the next step, as the next components seem to be $200 and up, and I don't want to spend that kind of money without some level of confidence that it will help solve the problem. Any help is greatly appreciated.
This is the replacement bulb used: