Multi color light will not come on/only flashes a second

Is the blue light flashing after the 20 seconds?

I have no idea

I called Chicago base with a similar problem and they said send it in...Was an internal problem

To pair another headset to the same base, you must first enable the multi-shift
pairing feature. Long press (5 sec.) the speaking volume minor adjust up button on
back of base until the power indicator light flashes.
2. Place a charged headset in charging cradle and red indicator light on base will flash
for 2 seconds if the multi-shift pairing feature is enabled. Within 10 seconds of
doing so, press either the "+" or "-" listening volume button for 3 seconds until the
headset talk indicator lights to indicate pairing mode, and goes out after successful
pairing. Repeat steps

the blue crt has failed most likely. very common with that model.

Your television is in need of repair. Hard to tell what exactly needs to be repaired but when the power light blinks in that way then this is the TV's way to tell you it needs to be serviced.

display comes on works 15 seconds no power just leds green

power supply if led ligth stays blue and then after a few minutes changes to orange is your power supply.if light color goes to a purple that is your mainboard $$$$$$$$$$$

or a new lamp. you could first replace the lamp.
the screen might work fine for a couple of seconds, but then it fades away or deteriorates. This means the lamp is going bad.