I did not see my TV listed but this model seemed to be the closest. I have a HL-S5087W and it keeps turning itself off by itself.
The lamp in the TV was replaced a year or 2 ago. Sometimes it stays on for an hour, but sometimes it turns it self off every 10 minutes. I usually comes back on when I hit the power button, but sometimes it turns itself off again while in the process of turning on. This has been going on for months and the frequency of turn offs is increasing.