Question about Mitsubishi LT-40153 LCD TV
When TV is powered on picture will work but no audio. I reset the tv and sometimes it works and sometimes I have to reset 4 or 5 times ... If ever works. Over time the reset will not work at all and I will take to be repaired. The tv is about 6 or 7 yr old and this is the fourth time I've had these problems. Any suggestions other than foul language???
All TVs today are actually computers which also receive TV frequencies. The audio has to be decoded from the digital signal then goes to an analog audio amplifier. When you hear no sound with the picture do you hear anything coming out of the speaker? A hissing sound when the volume is way up?
If you hear a hiss then the amplifier is working but not getting anything to amplify. This could be due to a bad solder connection or a problem with the CPU and/or a switching circuit. Without a schematic I'm guessing here.
The bottom line is, there's probably nothing you can do to fix it unless you're used to dealing with SM (surface mount) technology and can touch up all solder connections from the CPU to the audio amp.
Whoever is fixing the TV should be able to tell you where you're losing the signal from the RF decoder to the amplifier as long as the problem is not before the decoder (which is probably all in software that the CPU runs.)
Posted on Oct 05, 2017
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Posted on Jan 02, 2017
SOURCE: mitsubishi 65831
If the lamp has failed, don't fall for just paying big $$ for a new one from Misubishi. Instead, of buying their whole lamp assembly, just buy the bulb from me or many other sources on the net and install it into the assy yourself.
Posted on Dec 31, 2007
This sounds like a DM problem. To repair this you will have to replace 4 or 7 capacitors (1000uf 35v).
Here are the instructions. Depending on your set this may differ a bit, but the central theme is getting the DM free to be worked on.
This was taken from a TV repair site used by TV technicians.
STEP 1) The DM Module loose. But itcan't be rotate out because of the upper plastic guide.
STEP2) How the DM Module is rotated out of the TV case. Allow thewires
entering the DM Module to be an axis point of the rotation.That way they barely move and don't get snagged or stretched.
STEP3) The DM Module out and the side cover of the metal housing removed.
STEP 4) My setup to do the soldering work.
STEP5) Up Close of the daughter board and the seven capacitors on
STEP 6) The daughter board unscrewed and flippedover where you will be soldering.
STEP 7) The UpperPlastic Guide that must be removed to rotate the DM Module out of theTV set.
STEP 8) Get this wooden horizontal shelf out (4screws) and getting the upper plastic guide out becomes easy.
STEP9) Helpful Hint about the wooden shelf and the platic guide that bothneed to be removed.
I hope this helps
Posted on Nov 07, 2008
SOURCE: Hello Need expert advice on
The 18 code does not exist. To read the code press device/input button and menu button at the same time on the tv. count the LED flashes 1st digit short pause 2nd digit long pause, repeats.
The red status lamp indicates there is no communication between the format board and the DMD board (light engine). The most common problem for this is capacitors on the Format board that require hours of labor and possibly sending the entire electronics package to Mitsubishi if the caps don't do the trick. Expect a very large bill, contact you local Mitsubishi Authorized repair facility about this, DO NOT take a chance on your corner repair shop to know how to accomplish this.
Posted on Dec 21, 2008
Yes, you are correct. there are a few component issues on the power circuit board that will need to be replaced. the mani component will be the capacitors and transistors.if not repaired soon, this unit will completely stop working.
Posted on Mar 11, 2009
SOURCE: New bulb/TV still shuts down
Its far more likely the result of the power pwb capacitors that have failed. As the 34 code will appear if the capacitors fail on the Power PWB. You can get the V26 DLP Power repair kit at the following link.with free instructions
Posted on Apr 30, 2009
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