Question about Memorex MLT1522 15 in. LCD Television

Open Question

Screen goes black but audio still functioning

HI there, our television turns on and everything seems fine for a minute or two, then suddenly the screen goes black and the sound can still be heard. If you trun it off and then on again it does the same thing, only quicker. If you keep on going it happens faster and faster until it is shutting the picture down as soon as you turn it on. If you leave it off for about half an hour it stays on for a few minutes again.

Posted by Jason Watson on

Ad

2 Related Answers

budmrtn

Bud Martin

  • 11361 Answers

SOURCE: my television turns on but within 2 minutes the

It will need parts, please read below to narrow down the problem.
Parts and prices: http://www.shopjimmy.com/catalogsearch/result/?q=Memorex+MLT3221
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.

Posted on Feb 03, 2011

Ad

Anonymous

  • 1622 Answers

SOURCE: the picture goes blank after

Hello,

Problem is in either power supply or the Y-Sustain board.

The Y-Sustain is a relatively large board out of which go connections to the side of the display; it's therefore closer to either the left or the right side of the display, has at least one rather large heat sink on it and fat power cables connecting it to the main power supply.

Often there are fuses on that board - one or more. Check those.

if they are blown you can try to replace them, but expect them to blow again - usually the whole board needs to be replaced.

I hope this will hear to solve the problem....

Posted on Jun 27, 2011

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
1answer

I have a 2 year old LG LCD TV (model 42LG60) and I am having problems with the screen. I turn it on and everything is fine for a few minutes and then the screen goes to red or green lines that are fuzzy....

Not really a solution, sorry, but I've got the very same problem. I haven't noticed the time before tv faults, but nontheless, it greenscreens or like in your case, redscreens as well. I've been told to open the back, which I did to check the status of the capicitors, which I've done. But, the capacitors "seem" fine. No bulging or popped tops. So, I'm at a stand still...not sure what to do at this point. If someone gives you solution, I sure would appreciate your forwarding it on to me. Thanks. Robert
11helpful
4answers

Screen goes black, still have audio

I first changed the 220uf capacitor with no luck. I flipped the BURN switch to on and the set has been working great for a week now. Daughter left it on for about 20 hours overnight with no problem. Anybody have an idea what those 4 tiny switches are for? I have heard these type of switches called "dip switches". They are tiny white switches in a yellow block on the lower left side of the upper circuit board. The top one was labled 40", the next one down was labled 46", the 3rd one was 4 letters "EW" something I think, and then the bottom one was labled "BURN".
11helpful
2answers

Screen goes dark after few minutes

check your LCD inverter maybe there is loss connection or some parts damage from inverter.
3helpful
2answers

A solid black block covers majority of screen - all else works

Try turning off the text box function of the closed caption decoder.
0helpful
3answers

No picture, sound ok

I have a similar issue. Sometimes the entire screen goes black and sometimes only one-half - either the top or bottom half goes black. The only solution we have found is to gently tap the TV (usually the front side) and the picture will come back for awhile. It almost seems heat related as it only goes out after the first 10 minutes of use. There must be a fix to this.
0helpful
1answer

Mitsubishi vs 5043

I turned the set on and everything was fine, then the screen went black and mullti-colored horizontal (arched) lines were flashing across the screen. The next day I turned the set on and everything was fine for about 5 minutes then the problem reoccures again. Haven't looked for solutions till now.
0helpful
1answer

LTV-27w7 blackscreen

Have you tried unplugging overnight? Sometimes mine gets screen garbage and that clears it up. Of course, now it says "Auto Scan Required" every time I power up. Maybe I should've grabbed that after Xmas 32" at Fry's for $400.
0helpful
1answer

60sx12b/13k black screen

Hi, you have some poor solder connections on the sweep board, this is an inexpensive fix for any tech to do, get it soldered and enjoy, good luck & Happy Holidays
Not finding what you are looking for?
Memorex MLT1522 15 in. LCD Television Logo

Related Topics:

82 views

Ask a Question

Usually answered in minutes!

Top Memorex Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76750 Answers

 Grubhead
Grubhead

Level 3 Expert

5720 Answers

Ekse

Level 3 Expert

13435 Answers

Are you a Memorex Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...