Screen does not light

Sounds like the cd/dvd drive needs to be replaced if you are trying to boot from it.

Eject any disk from the DVD device.
Turn the computer off.
Disconnect the "data" and/or the "power" connectors from the DVD-ROM.
Turn the computer on, and see if it starts when the DVD-ROM is not part of your system.
If it starts, then your DVD-ROM needs to be replaced.

one or 2 blown capacitors in the power supply
you will see the dome tops where they vented

DVD-3 RCA phono outputs(red & white=audio,yellow=video
I have a DVP-NS700,the same happens on mine.Turn it on,goes green to red(standby),then press eject,it will then power up properly.

depending on your tv there is a function to turn screen off. most tvs come with this feature. on the remote there will be an power key with a red or black button. this is to turn the screen off. if it does not have this function and there is no screen saver setting on the dvd play there is not much you can do for this situation .

POWER SUPPLY OR LCD PANEL INVERTER BOARDS . AVAILABLE THROUGH VIZIO , PARTSTORE.COM OR EBAY

What do you have your remote wire for your amplifier connected to?

it may be becoz you are using too many things from 1 plug socket / power adapter.

If the Tv turns on (power supply is ok), screen lights up (inverters are ok) but don't get a blue screen, menu options, source options, or audio, it's most likely the main board (aka Motherboard) is faulty. If a DVD player is hooked upto the TV, check whether you can get audio from that (change the source using remote), in such a case it could be a problem with LCD Interface board. My $3 is on faulty Main board.

Sounds like the power supply in the dvd player has failed. It works just well enough to turn on the led infront but as soon as you go to do anything it shuts off. This is common in cheaper dvd players. Unless you can troubleshoot electronics. Or know someone that can. Your best bet is to unplug the unit and disassemly and retrieve your dvd.