Hi, The light engine not turning on is a software issue if and only if it was working before, and after update to v1.1.00 or v1.1.01, does not work anymore (not even the Philips logo will come on screen.).
For all other cases, it is a hardware defect. Anyone who is experiencing this out-of-the-box, has a defective hardware.
PS: If the Philips logo comes, but the home screen doesn’t —> it is a different software issue that can be solved by performing a restore by cable.