When I hit power button nothing lights up but I hear the subwoofer power on but still no sound. It's as if it wasn't getting power.

Sounds like something is jammed and overloading the machine. Check for locked motor.

Sounds like main board fault. Contact the authorized service center for Philips. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/

Is it trying to boot up or is it doing absolutely nothing when you plug in the power cord and hit the power button?

When you plug in the power cord is there any lightswhatsoever on the laptop, where the plug goes in or on the AC Adapter of thepower cord?

When you press the power button do you hear fans running, hard drive spinning,lights on the computer, hear any beeps or lights constantly blinking, hear theDvD/CD drive click and the light on the drawer of the DvD/CD turn on for asecond or two? If so the laptop is trying to boot or may have booted, butthe screen is not showing for some reason.

Beep tones and blinking lights tells the technicians what is going on with thelaptop and why it is not booting. Most times it's a motherboard issuewhen you hear beeps or blinking lights continuous.

Maybe your power cord is bad if you don't get anything to happen whatsoeverwhen you press the power button. And if that's true maybe you wasoperating off the battery the last time you had it on and since the power cordis bad, it was not charging the battery so the battery is drained and the powercord is bad.

Maybe you have a Static Charge Buildup. Remove the Power Cord, Remove theBattery, then Press and Hold the power button for 30seconds. After 30 seconds plug the power cord back in (leave the batteryout) and hit the power button to see if it boots. If it does, you can putthe battery back in and let it charge.

Hit the small reset button on back,I used a toothpick

hi,
That sound may from the color wheel. Open the angine, open block front of lamp.


open cover of color wheel and grap it.

Rotate color wheel manualy , listen it. If hear fristing sound, means color wheel is bad. Replace it too.
Good luck.

Hi,
TV needs lamp replacement as existing lamp got weak or has been reached to end of its working life, please note that lamp is not dead or broken so that is why lamp lit is not lit at tv front.
Hope these info will help you.
Thanks.

Hello,

The issue seems with with the mainboard please get it checked.

Thanks

Disconnect the speakers and see what happens. Carefully examine the speaker cables for unwanted connections (shorts).
Take a clue from when the power problem appeared. Something was moved and made the buzz a (probable) dead short.

My RCA model #RT2870 subwoofer doesn't work but the sub light is on... HELP!!!

It's possible that the convergence IC's may be bad in this set along with a few resistors. A TV repair shop should be able to fix the set for you.