Question about Memorex MLT1921 19 in. LCD TV

1 Answer

I have a memorex. I am getting sound but no picture. When powered on, the memorex sign shows up but then no picture just sound. Also makes a slight screeching sound for approx 10 sec. when powered on.

Picture worked for about an hour this morning and suddenly the picture went out (black screen), but sound works fine. Tried unplugging,powering on/off blanket over TV, etc. Makes a light screeching type sound for 5-10 sec. when powered on.

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  • Memorex Master
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I guess the blanket draped over the TV is intended to give it a "timeout". Anyway, you will likely conclude eventually that the internal power supply has failed.

Posted on Jan 02, 2014

Testimonial: "Wow. thanks for that wonderful insight Tom. I was just going by some solutions posted here. I thought it was a little crazy myself, but willing to try almost anything. Your "expert" opinion was so helpful. Thanks for nothing."

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  • 362 Answers

SOURCE: Can not access menu or input functions

Hi rduncan27,
I will be happy to help. 88% of LCD tv problems are with the backlight, the symptoms you described indicate a probable inverter malfunction. Lets do a simple test to check the functionality.

  1. Get the tv to a point that it is producing sound.
  2. Take a flashlight and shine it on the screen.
  3. Look very closely for a dark video image.
Let me know your findings and we can proceed from there.
Lone99star

Posted on Jan 26, 2009

jhinsincity
  • 616 Answers

SOURCE: after few minutes LCD picture went black but sound works ok

most likely the power inverter, also suspect the p/s. best to have a trained tech check it. Julio at milleniumtvsvc@gmail.com

Posted on Jul 21, 2009

  • 1 Answer

SOURCE: My T.V.'s picture suddenly disappeared with

If the TV has been moved around or traveled , it may be a loose component or a solder joint / wire came loose. If you are going to junk it , then have someone you know and trust with ability open the unit and closely scan the board connections . Some soldering work is poor enough to come apart with use. Good Luck.

Posted on Dec 23, 2009

Testimonial: "Thank you, I will give your ideas a try. "

budmrtn
  • 11361 Answers

SOURCE: the tv briefly powers up shows the memorex logo

The poroblem can either be the 12~18vdc power supply section is not supplying the power to the backlight inverter board or the inverter board went out, you need to check voltage on the power supply, also look to see if you see any caps with leaking/bulging top.
See example of failed TV and monitors here:
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Posted on Jun 13, 2010

  • 1 Answer

SOURCE: No picture on Memorex MLTD3222 flat panel LCD.

I recently got this tv from somone because of this exact problem. I have found a solution that works for mine. You can check to see if it works for you also. What I did was take of the back cover. 3 screws (1 big one in the center and 2 little ones below it). Next look at the power board. If plugged in and turned on the red light on the power board should be lit up. If so your power board is fine. Next find the component that has 4 switches. I manually turned these on and turned the tv on and it worked! Has been working ever since!

Posted on Jun 27, 2010

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No picture memorex mlt3221


remove the back of set... locate the power supply board ( the A/C cord will be going into the board .. look for any leaking or bubble /swollen tops/head of the capacitors .. a lot of sets I have repaired have been due to the capacitors going bad .but you will need a multimeter to check for proper voltages ..gotta remember though is that even though the tv is off those capacitors hold a charge BE VERY CAREFULL ..this is why I would recommend (multimeter) getting one before you tackle a job like this..

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http://www.retrevo.com/support/Memorex-MX4118-Radios-manual/id/1082dj096/t/2/

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The tv briefly powers up shows the memorex logo and then the screen goes black no picture, but stays powered up. And will not allow or show any functions please help


The poroblem can either be the 12~18vdc power supply section is not supplying the power to the backlight inverter board or the inverter board went out, you need to check voltage on the power supply, also look to see if you see any caps with leaking/bulging top.
See example of failed TV and monitors here:
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

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1 Answer

No picture but sound. When turning the tv on the


Power supply issues - I bet bad capacitors 'dried out' .
A good servicer should be able to fix it for you.

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I have the same TV. and same problem. I changed the power supply with a similar one that has the same plug. the TV came back to life. voila.

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I turn it on, it clicks off within a few seconds.


can you be more specific as to "plastic tabs that show signs of slight melting"? Like where are they in relation to components / power supply / heatsinks / power transformer? A first shot... it may be output power fets/transistors (one is open or shorted) that is making one or more of the speaker outputs go to the PS rail. DC shutdown. Does this receiver indicate any "overtemp" or "protect" warnings? I really need a little more specifics.

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