I turned the set off the other day with the front on/off switch. This morning, I tried to power up the set and even after trying to use the system reset, un-plugging the set, and trying everything I could, the set would not power up. I unplugged the power and waited the customery five seconds, used both the remote and or power switch. When the system reset is pushed, the gree light in front blinks rapidely, but it goes out after that. I have had this happen before. I saw some possible solutions to this problem in other postings.
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Re: can not reset tv
These sets have a common problem with the front panel buttons sticking and not allowing the set to turn on. Unplugging the control panel and using the remote to turn the set on normally diagnoses that problem (If you try this, remember that once the set is origionally plugged in, it takes about a minute and half before the set can be turned back on.
Another problem could be in the convergence circuit. If you hit the power button and the indicator light comes on and shuts off then that is the circuit that is most suspect. The -24 volt line fusible link as well as the 24 volt line will open up if the convergence IC shorts out.
There is a way to diagnose this set by pushing in and holding the menu and device button on the set at the same time until the indicator light starts flashing. There are two sets of flashes, such as, 2 flashes and then 3 flashes.
Hope this helps.
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How to reset the television to the original factory settings.
Article ID: 42994 ' Last Updated: 08/15/2015
WARNING: FOR LCD AND PLASMA TELEVISIONS: This procedure will reset the video calibration settings of the TV. If you paid to have your TV screen specially calibrated, you may want to first try performing a power reset instead. Otherwise, any special calibration settings will be lost. A Video Tutorial is available with information about this topic.IMPORTANT:
The supplied remote control is necessary to perform this procedure. Then be sure to point the remote control towards the front and center of the television.
If lights on the front of the TV are blinking or flashing, follow the steps in this answer.
Unplug the TV power cord from the electrical outlet.
Allow the TV to remain without power for one minute.
Plug the power cord back into the electrical outlet.NOTE: The TV should turn on automatically. If it does not, turn it on.
Wait approximately 40 seconds for the TV to completely start up.
On the TV remote control, press and hold the UP ARROW button.
While holding the UP ARROW button, press and release the POWER button on the TV set.
The TV may turn off and then back on.
The button may be on the front, top or side of the TV. If your TV has an Energy Saving switch, be sure to press the POWER button rather than the Energy Saving switch.
Release the UP ARROW button.NOTE: The initial setup screen displays if the above procedures were performed correctly.
Follow the on-screen instructions to complete the initial setup.
IMPORTANT: If the reset did not complete successfully, disconnect all devices from the TV and turn off or disable the network connection the repeat these steps.
This is called the blinking green light of death-----only one of two things can cause this problem.
First: remove front speaker grill (IT PULLS OFF) AND remove inspection plate behind it; look for the two bundles of wires coming down and to the right from the front keyboard of the set.
Unplug both plugs you find (different and marked so you cannot mix them up-----the idea is to take the front keyboard out of circuit-----set will still function with remote as receiver is behind front screen)
Try (after 70 seconds) to turn on with remote
If it comes on---defective reset button on front keyboard----use set only with remote or remove and remove actual reset switch---it is located behind and part of frame for screen----entire front screen would have to be removed to get at it.
Second: if disconnection of the front keyboard does not help, the DM unit is bad.
As you look from back of set it is large metal box at extreme left side.
The blinking light is the unit trying to "Boot" up-----these have a problem where caps and a few other parts in that unit fail-----kits on the net are available----Mitsubishi no longer sells or services these units but PTS Electronics does repair them.
Let me know if you have questions and try disconnection of the front keyboard FIRST.
Try this: 1) turn on the TV 2) from the remote control press MENU 2,4,7,0 then ENTER 3) tv will state on screen that it is INITIALIZING 4) when done press the front reset button. 5) should be good to go!
The most likey cause of this is poor solder connections either in the power suply area or the convergence circuit area. If you can solder and are comfortable working inside the set where there are potetially dangerous high voltages (even when unplugged), you maight be able to resolve this yourself. Try resoldering any connections on the boards that appear grainy or have rings. Update this with your results.
Hey dudes...even i hav had the same problem that too with the same model specified here..Its a problem actually concerned with the power circuit boards of the tv. Its best to get it checked by an authorized technician. For me I had to replace a transistor on one of the boards. But after that my tv came up with a new problem....the colours appear like rainbows! Could nyone xplain y dis is happening?
Try this before calling a factory authorized service center:
Press " menu 2 > 4 > 7 > 0 > enter", on remote. After settings have been initialized > press the system reset button on the front, once the LED stops blinking > reprogram settings and tuner channels (if not using box). IF NOT fixed call for service (get estimate before repair) and suspect repair of DM PCB (printed circuit board).
How old is this set? If any age, might be time for a replacement, you can get a 50" for under $1000 now. Dont know about your issue, I have never heard of one not turning on because of a timer, suspect you may have a micro issue, the power cord unplug would be advisable, but sounds like you tried it, have you tried the buttons on the front? Do you clean the screen with something liquid? Some of these the buttons go bad and confuse the micro if you use liquids on the screen and let some dribble down the frame. Might pull the speaker grill off and there should be 2 1/4" screws on 2 brackets loosen and the brackets will drop, the screen can come out and there is a long connector that goes from the front to just behind the middle tube and if you unplug it it will kill the buttons on the front and if it is your problem will allow the remote to function, reassemble reverse of disassembly.
MMMM Hard call here. The fact that it does try to come on blue maybe an indication that the power supply regulator circuit is good. It could also be a shorted blue tube and when it comes on its overloading the screen drive and the set goes into overload protection shutdown. The real way to see Would be to pull off the blue crt socket as well as the Hi Voltage lead on the crt and see if the set comes on without blue. If it does Your gonna need a pict tube. If it dosent then troubleshooting along the switched power supplys would be neccassary.. BUT I advise you THAT IF YOU HAVE NO EXPERIENCE TROUBLESHOOTING TV SETS PLEASE SEEK A PRO TO ASSIST YOU AS THERES VERY HIGH VOLTAGE INSIDE THESE SETS EVEN IF THEY ARE UNPLUGGED. GOOD LUCK