Question about Sharp Televison & Video

2 Answers

Power supply bad on Sharp Aquos LC - bad board - schematic to ID?

I have a 30'' SHARP Aquos LC30HV2U that has a bad power supply. Nothing happens when I turn on the LCD - though it is getting power confirmed by green light going on but nothing on LCD. Visual inspection of boards look fine. How do I find out schematic to find out which board is bad?
Kathy

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Sharp Master
  • 1,779 Answers

Buy the green light going on means Standby is ok. Next, would be to locate the plug coming from the main board to the power supply and find the post that says PO which means power on. With your meter on that post, press the power button as see if the reading goes High, if it does then the main board is able to turn on the power supply. Next, find the plug on the power supply that goes to the inverter( the long board on the side) remove it and see if you have 24 volts coming out of the power supply when you press the power. If you do, then the inverter board is bad, if you don't have 24 v, then the power supply is bad. There are NO diagrams available for these set other than a flow chart if you can find one. A regular svc tech does'nt need a manual for these anyway.

Let me know how you do Kathy ?

Posted on May 17, 2009

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 3 Answers

Take a close look at capacitors on the DC power (where the line cord plugs in) - if any of them are bulging or have a white substance on them instead of shhiny metal - then the capacitors are bad. I recently replaced all the capacitors on the DC boards on a coupld 22" LCD monitors and for about $15 each (including shpping) go them both working again. I found kits of capacitors specific to my monitors - could also go to the local electronics component store or other oinline sources to get the individual capacitors for a couple dollars each.
http://circuitsector.blogspot.com/2010/05/how-to-identify-failed-capacitor-on.html

Posted on Oct 27, 2010

2 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

dsacco86
  • 1077 Answers

SOURCE: have a 30" SHARP Aquos LC30HV2U that has a bad power supply. Nothing happens when I turn on the LCD - though it is getting power confirmed by green light going on but nothing on LCD. Visual inspection

You did try the CLEAR button on front of the box?
One possible idea is the cables going the box to the TV. ( might be bad )

If your sure about the problem, you can get your Service Manual here:
http://www.nodevice.com/manual/newmans/upsharp/LC30HV2UPDF/get53718.html

This with have all the schematic, diagrams, part number, and test points you need.

Posted on May 17, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My sharp aquos 30 inch tv will not come on. what could be the problem


Hello; I have an similar LC30HV2U for sale in my TV repair shop for $350. This is a 2 piece unit. The AV box and the monitor. I am also a Sharp authorized servicer. In the monitor there are 2 inverter boards on the right side that have an 80 % chance of causing this problem. This set counts "lamp errors" due to one or more inverters not working on startup. Once the set accumulates 5 lamp errors, It will not allow the set to come on. The first thing Sharp tells us is to replace both inverter boards. About $90 each. If those don't fix it the cost will go much higher due to a bad power supply board or bad LCD Panel. Hope this helps, John

Jan 02, 2011 | Sharp Aquos LC-30HV4U 30 in. LCD HDTV

1 Answer

I have an LC30HV2U. When you press the power button, the green light comes on then goes to blinking red. Obviously, no picture. Can you help or make a suggestion


How old is this tv and what are measure you taken to fix tv problem?
Let me know so I might help you to fix its problem.
Thanks.

Sep 08, 2010 | Sharp Aquos LC-30HV2U 30 in. LCD...

1 Answer

Sharp lc-22sv6u won,t power on. no green light.


Sound like the TV is in protection mode. This happens when a part goes bad inside. the TV turns OFF to protect the other parts from being damaged.
Most commonly it's a power supply related issue. A bad capacitor or transformer on the power supply board is to blame.
For a do-it-yourself fixer with electronic experience, a Service Manual is the best for trouble shooting the problem down to the bad part. Normally, you can find it over the internet for less than $20.

Jul 31, 2009 | Sharp Aquos LC-22SV6U 22 in. LCD EDTV

1 Answer

Sharp 52" Aquos LCD Will Not Turn ON-Blinking LEDs


I had a similar problem. Fleeting video, then audio only for few seconds and then nothing except the green power LED blinking on and off.
I changed the power inverter board, backlight inverter boards and power supply board but still the problem is not gone.

Just 18 month old TV and out of warranty.

Jun 06, 2009 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

1 Answer

Have a 30" SHARP Aquos LC30HV2U that has a bad power supply. Nothing happens when I turn on the LCD - though it is getting power confirmed by green light going on but nothing on LCD. Visual inspection


You did try the CLEAR button on front of the box?
One possible idea is the cables going the box to the TV. ( might be bad )

If your sure about the problem, you can get your Service Manual here:
http://www.nodevice.com/manual/newmans/upsharp/LC30HV2UPDF/get53718.html

This with have all the schematic, diagrams, part number, and test points you need.

May 17, 2009 | Sharp Televison & Video

1 Answer

Sharp Aquos LC-42D62U Completely Without Power


If you have no power at all , the then problem concern the power cord or the power supply board.

You need to test the power cable first, and eventually test and replace the power board, the job can be done by any local technician.

Here the replacement power board.

Here all parts for your set: LC-42D62U.

Mar 06, 2009 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

1 Answer

Sharp aquos has green and white vertical lines


You must contact a svc co. This is a upper or lower buffer board problem and possibly a control board. Nothing you have done wrong, it just happened.

Feb 28, 2009 | Sharp Aquos LC-30HV4U 30 in. LCD HDTV

1 Answer

Sharp aquos lc -32da5u


Probably needs a new main unit or power supply board replaced. Most times is main unit

Jun 17, 2008 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

3 Answers

Sharp Aquos LC-30HV4U


replace the supply board
or repair it *** there's problem with supply

Jun 13, 2008 | Sharp Aquos LC-30HV4U 30 in. LCD HDTV

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

2,191 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sharp Televison & Video Experts

The Knight
The Knight

Level 3 Expert

73691 Answers

Jaime Hernandez

Level 3 Expert

2315 Answers

Cindy Wells

Level 3 Expert

5060 Answers

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

Answer questions

Manuals & User Guides

Loading...