The TV (Sharp AQUOS Lc32d44u) backlight will only stay on after multiple cycles of turning on/off. Eventually the TV does work but this process is very frustrating.
Is this a problem with the backlight inverter board? A grounding problem? Maybe a software bug? I have opened up the back cover and tightened every screw I could find as I read this sometimes solves the problem but it had no affect as far as I can tell.
The fact that the set eventually does turn on makes me think its a grounding problem or a loose connection somewhere or else I would think the set would not turn on at all. Is there any way to determine this from home?
Thanks
Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
SOURCE: Blinking Power light on Sharp Aquos
You should contact Sharp to find out where you can send the set for factory service for your area. They work by territories. The local repair tech would not normaly be trained and equiped to service this type of set.
The fault can be on a number of boards, including the main processor, or the matrix drive, or right on the backplane of the screen. The boards interact with each other and talk to each other using their own processors and a data buss. The backplane of the screen is using enbeded technology for the LCD drive itself.
Trying boards on a guess will end up being much more costly than sending the set out and having it proberly serviced. Also, at home you would not be able to perform any of the factory level adjustments if necessary.
Jerry G.
SOURCE: Sharp Aquos turns itself off
How many times per second does the POWER led blink? (dont worry about the OPC).
1x per second (constant, steady blink) = bad inverter/lamps
2x per second = bad power supply
3x per second = bad main board
You can buy the parts online and fix if yourself!!
SOURCE: Picture Blacks Out, Sounds Stays On
I spoke to several representatives from Sharp and ultimately they are sending a repair person to take care of this problem at no charge. They realize that this is a problem enountered by several people who own this TV. Hopefully, the repair service will be here in the next day or two.
SOURCE: Sharp aquos lcd screen goes blank
i was having these same problems with the screen going black, and i found that when i hit the back of my tv it would work sometimes. so, i improvised on some of the advice on this page and so far no problems. here is what i did (its very easy):
1. lay the tv on the floor and take off the back panel. (i think 12 screws)
2. on the right side of the tv (as you are looking at the back) you will notice a large metal covering that is held in place by 6 screws. unscrew these and remove the metal cover.
3. you will notice that the three screw holes on the left side of the board have some sort of metal or solder around them, in sort of a star pattern. when i looked closely i noticed that most of the metal (solder) was tarnished, or kind of blackened. (this must mean that the ground screws werent getting a good connection and this would explain why it would work sometimes when i hit it because it would vibrate the screws enough to get a good connection! )
so, take a pencil eraser and erase all the black or tarnish off the metal surrounding the screw holes. thats it! (to be safe i took some sandpaper and cleaned up the screw holes on the back of the metal covering, but i dont know if that was necessary)
at this point i followed another gentleman's advice to do a hard reset. this involved unplugging the 8 connections although i dont know if this was really necessary because i believe my problem was a ground issue. i did it just to be safe. his advice is on this site if you want to do this step.
4. i put everything back together and it worked! i performed a soft reset at this point which puts your tv back to factory settings. just go to menu>setup>reset>return to factory settings? yes
this will turn your tv off and back on. that's it. so far so good for me.
SOURCE: How do I determine which backlight inverter is
Most of the time is the Master one.The A board,But sometime the Slave board B.Take chances,but the A is the best chances,because is the Master board.
Testimonial: "Then I will go for the A thanks."
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