Question about Toymax Magnavox 37MF231D 37 in. LCD TV

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Powers on for about a second but nothing comes on, only a black screen but i can tell the backlight is on, then it powers right back off. i need the schematics, anyone know where to find them?

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So you are getting gray glowing screen without the pictures? Sound OK?<br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><a rel='nofollow' href="http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide">http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide</a></span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> </span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><a rel='nofollow' href="http://s807.photobucket.com/home/budm/allalbums">http://s807.photobucket.com/home/budm/allalbums</a></span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"> </span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><a rel='nofollow' href="http://en.wikipedia.org/wiki/Capacitor_plague">http://en.wikipedia.org/wiki/Capacitor_plague</a></span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"> </span><br /> <span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt">Parts: <a rel='nofollow' href="http://www.shopjimmy.com/">www.shopjimmy.com</a></span><br /><span style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA">Capacitors kit: <a rel='nofollow' href="http://lcdalternatives.auctivacommerce.com/Viewsonic-C196320.aspx"><span style="mso-spacerun: yes"> </span>http://lcdalternatives.auctivacommerce.com/Default.aspx</a> he can make you a set of caps.</span>

Posted on Aug 25, 2010

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Posted on Jan 02, 2017

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I have a 47" Philips LCD TV Oct 2008 Model # 47PFL3603D/F7 When I turn it on, it works fine for about an hour or so. Then the screen goes black, not a fade right to black. Sound is still on.


The backlight inverter is built into the power supply of this unit. When it fades to black screen, do you see any backlight at all?
If you do see some light, you have a 'blank screen' problem and the backlight is not the cause. Since you can still hear sound and can control the tv otherwise, the problem is likely in the TCON board.
If there is no light coming out, perform a flashlight test (search YouTube for details on this). If you pass the flashlight test, then try replacing the power supply board.

May 24, 2017 | Philips Televison & Video

1 Answer

Sony KDL-40XBR2 - powers on, backlight is on, no pic, turn it off and back on, same for 10 to 15 seconds, then TV does power off/back on by itself...most of the time picture then shows up.


Depending on your enegy, on home, if is variable or steady 110V
you can check these on your TV, but safety first, or seek a qualify tech:
1) bad capacitor for power module **
2) bad inverter board or capacitors burn.

good luck!

Jan 16, 2017 | Sony Computers & Internet

1 Answer

Dell st2410b monitor won't stay lit


Ok, same issue here as well. Monitor would come on for 1/2 second and then the backlighting will go off. It's next to impossible to tell, but if you shine a bright flashlight at the screen, you can make out the video signal/desktop.

I have now replaced all the Capacitors except the very large one (didn't come with the kit that was available.) None of my caps looked bad (bulging) including the large one. Unfortunately, I still habe the same issue

So my question is....large capacitor replacement or something else?

Nov 29, 2012 | Dell ST2410 Monitor

2 Answers

Flatron w1934s display problems; symptoms are black screen after 2 sec's of power up. i have tried wiggling the monitor cable/nothing, did notice if i unplugged the monitor cable you can see the screen...


hi good day
before you come up that the main board was the problem lets verify first to narrow down where the problem came from. now as you said you have been tried to put a backlight just to know if their is a problem with the backlight but still you have black screen so which mean the inverter ballast is possibly good as will as the backlight. ok here is on how will you trace the main cause you need to turn on the tv unit then check if their is a INV_ON voltage around 3.3V coming from processor going to inverter ballast, now if do not have voltage turn off the unit then disconnect the connector going to the ballast board and turn on the unit check again the INV_ON if still no voltage come out you have bad processor from the main board. now if the case is the INV_ON voltage is present their is a shorted component at the ballast board that is why the screen is going black after you turn on. if their is an error detected the main board will cut off. hope this will help you thanks for consulting through fixya god bless.

Sep 05, 2011 | LG Televison & Video

1 Answer

Black screen on booting my Compaq 610 notebook


If it seems like you're accessing the hard drive (drive light comes on, flickers intermittently, then goes off, it's a good chance your screen is bad.

First thing to do is plug in an external monitor and start up the laptop. If it comes up with windows, you know it's the screen.

To find out if it's the backlight, or the lcd, toggle the monitor function and shine a flashlight on a slight angle to the screen. If you can faintly see what was displayed on the external monitor, then the backlight inverter is probably bad.

If the external monitor didn't come up, you're probably looking at a motherboard.

The good thing is that all of those are covered for one year under Compaq's warranty, on a new machine.

If you are able to use the external monitor, back up your data, because HP/Compaq usually reformat the harddrive. Additionally, if you've added memory, pull the cards. They want it sent back the way it came from the factory.

Jan 09, 2010 | HP Pavillion ZV6000 Athlon 64 3500+ 15.4in...

1 Answer

Screen is black, green light is on. Disk light comes on for a second when power button is pushed, and fan comes on briefly. Otherwise, nothing. Same outcome on AC or Battery or Both. I tried the remove-AC,...


Hi,

There are approx 6 reasons why this might happen:

  1. The backlight has gone (Find a dark place and shine a torch into the screen and see if you can see an image in the background, if you see an image then the backlight has gone) - Needs a new backlight (Engineer to remove and fit) or have a new panel fitted.
  2. The panel has died - Need a new panel
  3. A cable has worked itself loose or is broken
  4. The inverter has gone - Need new inverter
  5. Long shot, the bios has got corrupted - Engineer could re-flash the bios
  6. Long shot, Mainboard onboard graphics has gone - Need new mainboard
My personal opinion is that the backlight or inverter has gone - Either way it needs to be opened up to repair it, consult a service centre and get a quote or repair it yourself if your up for it.

Thanks

Sep 05, 2009 | Acer Aspire 3680 Laptop

2 Answers

Samsung SyncMaster 243T blacklight


indeed, probably the backlight...
Nothing to do about that but repair or replace, sorry...

Nov 13, 2008 | Samsung SyncMaster 243T (Black, Silver)...

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