Blue light remains lit but lose picture. no other indicator lights flash. if i unplug the tv it will restart but lose picture again after half hour

There is a manual switch on the bottom of the TV. Flick it on and TV screen should come on. The power light will come with this switch off but the screen won't. It had me cursing for a while until I saw the little switch.

Unplug,replug the tv an hour later,let the tv reset itself,might work again.

There is a switch on the bottom of the unit that has to be turned on. The power light will come on but not the screen until the switch is on.

I had the same problem. I got the service manuals, did some troubleshooting and figured out that my DM3 is bad. I'm trying to track down the details.
Join my google group if you'd like to participate in DM3 troubleshooting.
http://groups.google.com/group/dead-dm3

Plug the Motorola charger into the end of
the headset.
The blue indicator light turns on when the
battery is charging. It may take up to 1
minute for the light to turn on. When the
headset's battery is fully charged (about 2
hours), the blue indicator light turns off.
1
With the headset power off, press and hold
the Call button for 6 to 10 seconds until the
blue indicator light turns on and remains
steadily lit.
Note: The blue light will flash as you press and hold the Call
button. Continue holding down the Call button until the blue
light is steadily lit.
Note: If you let go of the Call button before the blue light is
on and steady, ensure that your headset is off before trying
again.

My Sony lost its picture and had a flashing light. Unplugging for 36 hours solved the problem.

hold the on button then turn up the volume

I think you have problems with the digital main PWB.

If the power PWB failed, turn off and change the pilot ligth to red.

PUT HEADSET IN PAIRING MODE

1. Ensure the headset is turned off (indicator light not blinking and headset boom is closed)
2. Press and hold the Call button. After about 4 or 5 seconds, the indicator light becomes steadily lit in magenta
3. Release the Call button and immediately open the headset boom. The indicator light remains lit in magenta.

If the indicator light is flashing in blue or not steadily lit when opening the headset boom, repeat steps 1 through 3

Probable bad blue CRT................T.