Question about Sharp AQUOS LC-37D40U BACKLIGHT INVERTER BOARD PN: IM3826-1
OK if you have blinking red light.
Try to open the cover then disconnect the inverter board after that try to power it on again..
If the light stays in blue (LIT) and of course you don't have picture or backlight you have faulty inverter board that need to be replace.
Posted on Nov 08, 2012
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Posted on Jan 02, 2017
SOURCE: I have Sharp Aquos LC-65D64U
It sounds like a backlight inverter to me. I am 99% sure. The buzzing noise you mentioned kind of confirms that, so does the backlight turning off. If you want to test them, then you are gonna need a multimeter. I will see if I can find a schematic in my collection, but be aware that this is a highvoltage device we are dealing with. May not be a good idea to test it yourself if you have never worked on electronics before. The sets hold nasty voltages for several days after its turned off and unplugged, and can injure you if you are not careful. I don't mean to scare you but its my job to tell you. If you want to proceed then I'm game.
Posted on Nov 01, 2010
SOURCE: I have a Sharp LC-46E77UN
THe problem is in the set top box. Or common called the tuner box. IT looses the 5 volts to the main display and thus the monitor will go into a shut down state. THESE boxes are factory repair only and must be sent off to repair.
Posted on Feb 20, 2011
SOURCE: Sharp Aquos LC-37d40u made a
That sounds like a dead power supply. Smell it to see if it stinks like it overheated.
There are 4 13v connector pins that can be spliced into from one standard spliced wall wart.
Common is negative if you study the mobo by scratching off the paint. Both fuse tracks for instance are positive, there are two more positive pins.
Posted on Feb 22, 2011
Did you check the service manual troubleshooting guide yet. You can try disconnecting the power to the inverter board and see if it will stay on and have sound. Basic LCD monitor and TV troubleshooting guide: Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
Basic LCD monitor and TV troubleshooting guide:
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Posted on Oct 27, 2011
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