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I have a Sansui 42' Hd Lcd Tv. When I turn it
The Backlights inverter, the T-CON,or the 24vdc power supply may have gone out, it will require in-depth troubleshooting. Please read below:
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:
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
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.
on Oct 11, 2011
I just bought my 42in
Cable box have HDMI port,hook it up on a HDMI cable to the tv,will improve picture quality greatly.Tries HDMI cable to hook up the PS3 system and go in setup changes to HDMI setup will get HD format picture,will be very clear no more grainy and inconsistanty.
on Feb 17, 2011
My tv was working fine
Check the power lead if it is fully plugged in, and if it still does the same thing it could be internal
problem. If the set is still under guarantee then let them to worry about it.
on Nov 22, 2010
The bottom half of my screen has gone black all
Less than a year old tv.Ur tv still have the manufacture warrenty.Look in ur owner manual,call the tv manufacture 1-800.... numbers on the owner manual.Talk to their customers service department,what locations or what shops they hire to call,to take care their product that still in warrenty.
on Oct 26, 2010
How to program the TV with a new remote
if you do not have the directions. first manually turn on the set. then i find the code button. it may not say the same thing but it will be similar in words. push code, then push tv, then repeatedly push power until the set goes off then find enter(or something similar). this is an automatic code find technique.
on Nov 10, 2009
SANSUI TV/VCR COMBO. WILL WORK ON DC CAR BATTERY. DOES NOT WORK ON HOUSE CURRENT. 110 IS REACHING THE BOARD. FUSES ARE GOOD.
Hi Matt, for what you say the internal power supply of the Combo Sansui, 110 volts a12v, is not working
Indicate model of Combo Sansui, which you are commenting on, in order to find the best possible solution
I wait your answer
Regards Franco Dosil
Hola Matt, por lo que comentas no esta funcionando la fuente de alimentacion interna del Combo Sansui, de 110 volts a12v
Indica modelo del Combo Sansui, del que estas comentando, para poder encontrar la mejor soluci?n posible
Espero tu respuesta
Saludos Franco Dosil
on Oct 14, 2019
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