My Mitsubishi wd-52628 TV does not respond to any actions on the remote or TV buttons. If I try to use any button on the front panel the TV turns off and the power light flashes.

Try a different hdmi cable

Sounds like the back light has gone mate. Unfortunately this usually makes the tv obsolete

"Initialize" a "factory reset". Power on the tv, on the original remote, enter "MENU 1,2,3 ENTER". This will get you to the factory reset window. Initialize the default reset and you are fixed. Try this before ditching the set or tearing it apart. Good luck and post your results for everyone here with the blinking green timer light issue. Thanks.

Replace the front key board panel. You should be able to get one at www.tvrepairworld.com just hit the contact button on the right and enter the model number and symptom they respond quickly.

try turning it on hold the menu button for eight seconds menu pops up try reseting the settings again as before you had the problem

Hi,
Is it Mitsubishi WD-52628 TV? please confirm model number.
Unplug TV from AC outlet for couple of minutes, replug back in, turn power ON and check, still same problem?
Lets read error code in TV, press Device and Menu buttons on front of TV at same time for 6 seconds that will activate error code read process. Led will flash in 2 sequence with half second pause. count it and let me know the error code to proceed.
Thanks.

I figured out I could still get the TV Menu so I pressed that and then I pressed 123 and it did a TV reset and then it was working again.

Change the 1000uf @16v capacitors on the FMT board that should solve your problem. You will most likely found that they have swelled. Let me know if you need further info.

We had the same problem. Luckily, we had a service contract, so it was serviced yesterday. The fix involved the service guy going through a "service menu" and resetting the TV that way. He was not "allowed" to tell me how I can access the service menu, however. I do plan to research this on the internet in case it happens in the future. It is basically a software/computer problem, and unplugging the TV isn't enough to clear it unless the TV is unplugged for "a long time." The technician said the length of time depends on the condition of your capacitors. Anyway, as a temporary fix, he showed me that you can go into the PIP mode. The device toggle for PIP apparently did still work with mine, so I was able to switch the device on the secondary picture and then switch it to primary, then toggle the PIP off. Good luck!

I have a Mitsubishi WD-52725 TV, too, and have experienced the same problems with it. My solution to the remote not responding is to push the reset button on the front of the TV (to the left of the Power button) with a paper clip and wait for the green light to stop blinking (about 1 minute). Then, turn it back on and try the remote again. Recently, my remote stopped responding when pushing certain buttons on it. I removed the batteries, and all of the little screws including the one inside the battery compartment and gently cleaned the contacts inside the remote and the circuit board with a cotton swab dipped in alcohol. After putting it back together, it works fine now.