I have encounter many of these issues with TVs going bad after a power outage which i something that can be complex. Actually almost all the TVs go through this issue sometimes in their life time.
What happens is that TVs have a circuit that controls the on/off phase; the circuit has resistors, diodes and capacitors to do the job. When there is a power surge, which is what happens when the power come back on, a diode, resistor or capacitor goes bad. Capacitors are the main ones that fail under a power surge/outage because they have a set of value assigned to them. The worst that can happens also is that a power transistor can go bad. The unit controls or regulate the power going in to the set.
So, if your TV does not turn on, turns but goes dean right after, or has the standby light flickering; you would need to have it check by a technician. On the other hand, you might want to check if its not just a reprogramming that the set needs.
SOURCE: Flashing Green Light on Front of 73" Projection TV
on the signal board replace the caps by the 5/9 volt regulators. c2p04 is the main culprit. 6 caps in total can be changed. I believe c2p05 also.
SOURCE: green power light will not stop flashing and tv will not turn on or off
You need to replace the 1000uf capacitors on the DM board thats the classic symptom of the DM caps being bad the light continues to blink repeatedly. If you need more info on the repair let me know.
SOURCE: blinking green light on front
do this press and hold device and menu button on the front of set.. this is to retrieve a to digit error code flashed by the leds. also this set neds to "boot" let the led flash for at least 70 seconds. if it continues to blink the tv failed to boot. There is service bulliteens that states capacitors in power supply can be bad. this capacitors are kinda hard to get to and rather invovled to replace
SOURCE: lamp light flashing green continually after power
the timer light will continually flash green.on the dm pcb and fmt pcb you have 4 capacitors
that pooch out.replace the 4 capacitors on both boards.will require a tv professional to do
this.
SOURCE: Green timer light on front panel continuously
ONLY 1 or 2 things can cause this problem----First thing to do is
remove front speaker grill--it pulls out and secured with plastic
pegs--behind it you will find an inspection plate---Notice the one or
two pairs of wires coming from the front keyboard
of the set---remove the inspection plate and follow the wires to the
right--you can unplug both plugs(most have two and they are marked with
letters and different sizes so you cannot get them wrong)
The
idea here is to remove the front keyboard with its reset button etc
from the circuit---You will still be able to try to turn the set on
with the remote---these sets have a Receiver(large metal box to the
left as you look from the back) and if the power goes out the green
light will blink for about 70 seconds and then go out---it is the
Receiver booting up.
If disconnecting the keyboard allows the
set to turn on--you have a bad reset switch and two choices---either
operate the set only with the remote or to remove the front screen and
get at the reset switch (it is tiny) and remove and or replace it.
If
disconnecting the keyboard does not restore the set to operation---the
receiver is bad---there are 4 or more caps and some pico fuses that can
fail in that unit---Mitsubishi no longer sells or repairs these--if it
is bad and not the caps there is a company you can send the unit to and
have it repaired--if you need to know their name let me know---you can
call them and get a quote for repairing the receiver.
SD Tech
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