Question about Sharp LC42SB45U 42 in. LCD TV

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Lc-42sb45u has to wait 10 minutes to turn on the power

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Posted on Jan 02, 2017

UpGrade
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SOURCE: Have a Sharp LC-42SB45U green light is on but no

This is the Actual solution, not a try this deal. You need soldering experience, and a multi meter. First pop the back case off the tv and look to the left, you'll see the inverter. It's got 8 or so pink and white connections on it and a few other wires and a ribbon cable. Take all of that off carefully. Now take out the screws that hold the board on. Once you have it in front of you look for the power connector on the far left above that you'll see two fuses. F1 and F2. Check both sides of F1 with an Ohm meter. Most likely it's blown. Replace this fuse with another one and your TV will be back running again. If you're feeling really clever you should touch up the cold solder joints on all of the inverters, and across all of the capacitors, some of mine were cracked.

Posted on Nov 11, 2011

  • 380 Answers

SOURCE: LC-42SB45U will not find channels from setup Auto

Make sure you getting a good signal and that you are properly connected to the tv. If all else fails, look into replacing the main board.

Posted on Dec 13, 2009

  • 28 Answers

SOURCE: I have a Sharp model

Voltages sometime increase/decrease during power outages. This mainly afftects the power supply of a lot of electronics equipment.
1. Check the fuse.
2. Check primary components like; Bridge rectifier, filter cap, switching components etc.
3. Check secondary (cold) side once you isolate the primary side to be ok.
Please consult a professional technician if you are not skilled in electronics repairing.

All the best
Rjn

Posted on Sep 20, 2011

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1 Answer

Sharp Flat Screen lc- 42sb45u It seems that whatever it is that controls the power (off/on) in my tv is not working correctly. The tv will not turn on using the remote or power button on the tv....


sounds like it could be a power supply problem - this is a common symptom for a failing capacitor. If you are handy with a soldering iron, you could replace yourself. Look for capacitor which has a bulging top located on the power board.

Oct 21, 2013 | Televison & Video

1 Answer

To long to come on


I would start with checking the capacitors. Replace any with bulged tops

Oct 26, 2012 | Sharp Lc-42sb45u Tv Parts 715t3150-2 Power...

1 Answer

My Sharp LC-42SB45U takes 15 min to an hour to turn on. Also, sometimes picture blacks out for 10-15 seconds. Any suggestions? Pat Courson


Have same problem. Not the proper fix though I found that taking the back off and heating it up with a heat gun for 30 seconds to 1 minute and tv works fine till you shut it off over night.Maybe someone can offer a solution with that in mind. Pretty strange

Sep 17, 2012 | Sharp LC42SB45U 42 in. LCD TV

1 Answer

I have a Sharp model LC-42sb45u that will not turn on since power outage.


Voltages sometime increase/decrease during power outages. This mainly afftects the power supply of a lot of electronics equipment.
1. Check the fuse.
2. Check primary components like; Bridge rectifier, filter cap, switching components etc.
3. Check secondary (cold) side once you isolate the primary side to be ok.
Please consult a professional technician if you are not skilled in electronics repairing.

All the best
Rjn

Sep 20, 2011 | Sharp Televison & Video

1 Answer

LC-42SB45U will not find channels from setup Auto Ch Search. Also tried reset with no results


Make sure you getting a good signal and that you are properly connected to the tv. If all else fails, look into replacing the main board.

Dec 05, 2009 | Sharp Televison & Video

1 Answer

My LC-26sh12u takes 10 minutes to


I had a similar problem where it displays "PLEASE WAIT" for several seconds alternating with blocky colors for several seconds and continuing anywhere from 5 to 30 minutes.

I inferred from a couple of sources that the TV is booting up when it says "please wait" by reading data from flash memory. I was able to fix my problem by resetting the data in memory to factory default values using this procedure from the service manual (wait until the TV is working before trying this):

Turn on the POWER.
Set the VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds.
After the finishing of the initializing of shipping, the unit will turn off automatically

Nov 21, 2009 | Sharp Televison & Video

5 Answers

Sharp Aquos wont turn on


this is either a power problem or the screen needs re-gasing

Jan 17, 2009 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

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