Question about Projection Televisions

1 Answer

No power at startup on Sharp LCD-32gd8e

I have the same problem with a just of of warranty unit and have noticed that if I hold down the on/off button at the top of the unit, the picture will appear and everything works fine, until I let go of the button and then the unit switches off.

Does everyone else with this problem, find that holding the button down does allow the unit to work. If so this shows that the power supply is OK and the unit functions... if you keep the button held down

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 203 Answers

Hard to diagnose some problems without hands-on. However, my guess is the power supply is fine, as are most on LCD's. The inverter board which powers the screen is the most likely cause of problems on that model set. Only other thing that i've seen is a shield that moved slightly beneath the main pcb. It moves because the putty that holds it in place was not rated at a high enough temp. and it simply turns to goo, allowing the heat sink to slide down and touch the main board. Three boards must be removed to find this problem. By holding down the power button on the set you may not be allowing the shutdown circuit to engage which means the problem could still be anywhere in the set. Sorry I can't be more help. All you can get is a guess here.

Posted on Sep 02, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Power keep cutting off . picture don't come up b4 it shuts down


sounds like the unit has a faulty power supply. the capaciters have just enough power to turn the unti on but are failing to hold a charge to maintaine it. with rear projection you most lily dont have a warranty, you can try contacting the manufacturer but unless you bought an extended warranty i doubt it would be of any use. consider purchasing a new tv or contact a tv repair specialist, since dealing with power supplys can be dangerous.

Mar 07, 2011 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

I have a sony kf-42sx3oou, i have just had the lamp replaced, since replacing it a few blue spots appeared in the top right corner but today a yellow line has appeared on bottom left hand corner, could you...


This problem was probably there before, but you only noticed with the new "Brighter" bulb.

This TV will require replacement of the LCD Prism unit.

This Prism blocks and allows colors so that the 3 LCD images may be mixed to produce the final image you see on the screen. When this becomes damaged or defective, it leaks colors (light). This Color Leakage apears as spots on the screens.

Where you see the spots is where the specific spot on the prism that is leaking light, the specific color that is leaking also.

This parts cost alone is normally $500 to $1000 dollars but is usually replaced under warranty. If out of warranty, I suggest living with it or selling it if out of warranty. Turn down the Brightness and it will not be as noticeable. I am sure you only see this with bright images.....like white backgrounds and such

Good luck.....

Mar 04, 2009 | Sony Grand WEGA KF-42SX300 42" LCD TV

1 Answer

Have an Aquos Sharp 32" 1080p LCD TV and the power went out in the house. Now the TV will not turn on, when I try the power indicator light blinks green repeatedly. Read the manual no help there....


This sounds like a problem that only a repair person can specifically point out.  It could be anything from a fuse to the "engine".
Try to find a local "authorized" repair person to give you a free quote with no responsibility on your part to get it fixed as TV repairs can cost 50% of what a new one would or what a working used one would.
Also, I'd recommend to NOT overload your electrical outlets and to not use without a surge protector (a real one).  If there is a storm or it's very windy,  try keeping not only your monitor for your PC off, but also your TV (unless you need it for emergency reasons).  Also, try getting a used battery powered cheap small tv with a digital converter box if you need to monitor the tv during an emergency.  Also, get renters of home insurance to cover the costs of weather related damage.
Last thing... be sure that any "extended warranties" offered by your local electronics store will cover the cost of any weather related power outages.  If so, it may be something to look into purchasing, although I generally advise to not buy into "extended store warranties".
OK, one last last thing... check the warranty with the manufactuer (SHARP)... If it's under warranty, tell them it's not working and you don't know why, so you need a replacement.
Good Luck! thomseye

Dec 13, 2008 | Sharp Projection Televisions

2 Answers

There should be a major recall on all Sharp Aquos Flat Screens T,V.'S. I brought a 32" model and the unit turns on for a few seconds then goes blank , only sound remine. I am going to contact the...


r u sure there is no warranty for that unit? when you buy a new set of TV there is always a warranty card provided together with your the unit...

Aug 11, 2008 | Projection Televisions

1 Answer

Sharp LC-32GD8E When we switch on set there is no picture just sound? My mother in law has same television and just had same problem What do you think it is and best solution


Okay. Here's my best stab at it. I've repaired several of these and it has been one of two things. First and most common is the inverter board. That is the board with a metal shield on it and a row of small transformers. Problems on these boards consist of open pico fuses due to leaky filter capacitors (usually 220uf is the value), or a transformer opens on this board. You can attempt to repair it or google the number on the board for a replacement unit. Second is underneath the main board sometimes a heatsink will slide down because it wasn't securely anchored and short or arc against main p.c.b.(solder side). To access this you must remove the two large side-by-side boards from their mounting brackets just to get to the board below that you want to look at the bottom of. This is a major disassembly, but it can be done fairly easily with limited distractions. When you remove the bottom board and all the plug connectors you will see a goopy, putty looking compound that was meant to hold the heatsink in place,and you will see a burn mark and open fuse or resistor if this is the cause of your trouble. By this you should know that I've spent my share of time researching this problem so as to help you and others like you. Good luck, Russmann.

Jul 17, 2008 | Projection Televisions

2 Answers

My Sharp LCD 26" TV shows most black and shadow colours as vivid blue, I have tried resetting the colour to factory reset but that didn't seem to help at all. It occurs on all channels and on 3...


the problem with LCD tvs are that they have back lamps that shine thru the LCD sceen. the job of the screen is to block the light of the different colors to make the picture. the problem is that the very thin screen can not block all the light. if the set has a back lamp setting turn down the back lamps and adjust the brightness control it should help a little. you my notice that the blacks and dark sceens look better when the room is fully lit and look much worse in a darken room.

May 27, 2008 | Sharp Projection Televisions

2 Answers

I bought a Sharp LC37DW99U at the end of November 2007. There is a one year warranty. The image developed a cluster of vertical lines on the left side of the screen in early February 2008. Brandsmart sent...


Im a HP LCD and Plasma TV technician and I know on HP tv's if theres vertical or horizontal lines, this can indicate a bad video controller board.

What i would do first is perform an alignment to see if that fixes the vertical lines. Your TV should have a feature for it to automatcially perform an alignment of the mirrors.

if the alignment doesnt work, I would say your video controller board is bad.

Mar 19, 2008 | Projection Televisions

Not finding what you are looking for?
Projection Televisions Logo

Related Topics:

55 people viewed this question

Ask a Question

Usually answered in minutes!

Top Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

matt martin
matt martin

Level 3 Expert

1191 Answers

yadayada
yadayada

Level 3 Expert

61249 Answers

Are you a Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...