28pw9618 power comes on - blue on light at the front is now flashing ( used to be constant). TV used to make a noise when i first switched it on ( as though power suddenly going to it ) but suddenly made a loud noise and all picture / now gone. TV is about 3 years old. thanks

Answered.

power supply issue

i think it is the power supply board problem

The power supply is failing

This is a protection circuit that prevents the tv from coming on (to stop damage of the components) ....you need to check your voltages off the power supply and make sure they all read well (EX: 24v12v5v etc). Also look for popped capacitors on the secondary part of the power supply that would make the values lower than need be for the tv to power on properly.


Hope this helps :)

Does it flash in a pattern or does it constantly flash - like 7 flashes then pause then 7 flashes? Or is it constant without pauses? Are you using a new power strip? It could be two things 1. Power supply or 2. Main board. is my initial thoughts. Have you opened it up to check the fuses, caps etc? If the power suply voltages look good its probably the main board.

Thanks,
michael

2000 Jeep Grand Cherokee Stereo Wiring Constant 12V+ Red/White Switched 12V+ White/Red Ground Black Illumination n/a Dimmer Orange Antenna Right Front Front Speakers 6" x 9" Doors Left Front (+) Light Green/Red Left Front (-) Light Green/Green Right Front (+) Light Blue/Red Right Front (-) Light Blue/Black Rear Speakers 6 1/2" Rear Door Left Rear (+) Dark Green/White Left Rear (-) White/Dark Green Right Rear (+) White/Purple Right Rear (-) Tan/Dark Green


Kenwood Wires:

Red: Switched 12volt
Yellow: Constant 12volt
Black: Chassis Ground
Blue: Not used
Light Blue/Yellow: Steering wheel control
Brown: Mute Control
Blue White: Power Antennae (or Amplifier remote turn on)
White - White/black: +/- left front
Gray - Gray/black: +/- right front
Green - Green/Black: Left rear
Purple - Purple/black: right rear

Tries tv unplug,replug it back like about an hour later.The tv now,it resetting itself back to the factory setting.It should work now.Not,than the power supply board is dead.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

most times then not it's the capacitors on your power board that blew there for not supplying the tv with enough power if you open it up and check the capacitors it should be leaking some kind of liquid or the tops have bubbled up. its an easy fix cost>>2 dollars each

light green and dark green -- right front speaker
tan and gray -- left front speaker
light blue and dark blue -- righr rear speaker
yellow and brown -- left rear speaker
orange -- constant power
yellow -- switched power
black w/ white stripe ground

always use a dc electrical test light to be certain your power connections are correct.