Question about Mitsubishi LT-40151 40 in. HDTV LCD TV
Will not turn off
Posted by Anonymous on
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Posted on Jan 02, 2017
4 capacitors on the DM board causes this they are 1000uf @35 volts replace these capacitors and that should take care of your problem
Posted on Mar 19, 2008
SOURCE: flashing green timer light on TV
change the 4 100uf capacitors on the DM board. You will need the service manual to get the set apart as its technical. But with the service manual and take notes you should be able to repair it. But the service manual for that chassis is mandatory or you will never get the chassis out without alot of trouble. Heres a link where you can get the manual emailed to you.
Posted on Mar 20, 2008
It sounds like you TV is overheating and the video is suffering and the lamp is overheating as well. Also, if your TV is over 2-3 years old, the mirrors (behind and below the big front screen) desperately need to be cleaned. Clean all filters and fans as well. (Look on side and behind the unit). Is the TV in a "hot" environment and/or dirty environment? DLP TV's are NOT sealed units. They need to be cleaned every few years to work well to have a good, clear, bright picture.
Posted on Aug 01, 2009
You will need to cahnge the capacitors on the DM board, very common problem. The V21 V19 DM repair kit at the following link contains the replacement capacitors and detailed instructions. Its listed under the repair kits catagory at the following link.
Posted on Aug 29, 2009
THIS IS MY STANDARD ANSWER TO THIS QUESTION==SOMETIMES PEOPLE DO NOT
TRY THE EASY POSSIBLE REASON--IF YOU HAVE ANY QUESTIONS LET ME
KNOW---IF THE ANSWER TOLD YOU something you did not know--rate the
ONLY 1 of 2 things can cause this problem----
First thing to do is remove front speaker grill--it should pull out and is 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 that is called a DM board--(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. It is called the DM board.
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.
Let me know what more information you need--I am here to help.
Posted on Oct 30, 2009
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