This is a protection shutdown circut kicking in, This is done so that if your tv is drawing to much current due to a overloaded circuit, it will shut down instead of burning up. Most of the time it is the convergence ic circuit or the power supply regulator ic. Thanks
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Re: turns green light on, goes right back off
There are a few things that you would need to know first, like is your set shutting down after the relay clicks, or no relay click. Also did you do a self test on this set. Press the menu and Device/input button at the same time for 5 seconds, This should give you a two digit code. What is the Code? It could be a number of things that cause the set to shut off after powering up. Check the code first, because this tell a tech what area the problem is in. If you want to change things I would guess by saying check the fuses F9A04 and 05 also change the capacitor C9a60.
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You tv used lamp XL-2400 or also known as F93087500. It is very common for this bulb to fail and have the exact symptom you are experiencing. I cant count how many times I have seen it.. Replace the lamp with either the exact Sony or an OEM and you will be back in business..
back or front of tv .... this could be a blown tube if coming from front. from back there is a high chance this is a blown flyback. i have also seen a blown capacitor that blows a hole in the board. be careful leave unpluged.
Yes this is the signal for a bad lamp. Other things can cause this. 1. Look at the new lamp. make sure it still looks good. not broken with little glass pieaces in it. 2. When you turn on the tv, put your ear to the lower back part of the tv near the middle. Listen for the start up of the color wheel (a low high pitch sound only at the start up of the motor). If this is good you will here a ticking sound only if the lamp dose not light.
Now with all this info. If the lamp lights (as seen from the back of the set) and goes out after a few seconds and you did not here the color wheel spin up, the color wheel is bad.
If you here the color wheel spin up and no ticking sound, the Ballast is bad.
The ballast part no. 939P978010
The color wheel is not avialable from Mits. You will have to replaced the light engine. It cost to much. Just buy a new tv.
i have seen this before and it may be the front power button being stuck and when your remote turns it on the stuck button turns it back off again. I have an older mitsubishi that will not boot up right sometimes and i have to unplug it and plug it back in fot it to come on. I used to pick up broken tv and fix the power buton and resell them
I had the same exact problem.
I removed the bulb and cleaned it. There is a small screen at the top of the bulb and it was covered with dust. Once it was cleaned I replaced the bulb and it solved the problem.
Thanks to those who posted the solutions