My LC-37d43U won't turn on, no lights, no nothing...?

Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

To know more about this, you have to download its repair manual. Its disassemble section will have all details.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Disassemble procedure to many popular brand TVs and other devices are given in detail with illustrations.

If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

prob with sansui sty 0330 LCD TV
hi,i have a sansui sty 0330 tv and the screen is flashing 1 second flash, 1 second good, then 1 second flash, 1 second good is going like this contineously

I suspect it to be a back- light problem. Check the CCFL lamps. If you wish to get more details, surf this link. http://electronicshelponline.blogspot.com/ There are more than two thousand and five hundred posts. All are related to television and other domestic electronic equipment service help.

TV Parts Universal TV Stands DLP Chips ShopJimmy You can get a universal stand from here.

The common failure in the power supply is due to cheap low quality capacitors, the replacement that was install probably has the same quality cap. I only use good cap from PANASONIC for my repair works.
The moudle is easy to replace, just remove the TV stand, all the back screws, and may be 4~6 screws for the power supply, it uses connectors so yoiu can easily remove them, just take good pictures before working on it so you will know how it goes back together.
You can try getting the module from www.shopjimmy.com, he is my main supplier for boards.
Just make sure to get the number as printed on the sticker of the power supply to get exact match, you can also contact him if you are not sure.
Here is the service manual: http://elektrotanya.com/sharp_lc-32_37d43u.pdf/download.html

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series

There is a problem with the standby section of the power supply. A flashing standby light indicate an overload which is caused by a shorted semiconductor in that circuit. It's fairly simple for a technician and should not cost much. You can't do that yourself it is electronic takes a long time to grasp.

http://www.retrevo.com/pdf/6700dj584/13/Connecting+HDMI+equipment#q=Sharp+LC-37D43U

Go here to this link about for help with hdmi cheers

Unfortunately I can promise you that you CANNOT repair this. Your power and opc lights coming on, but the tv is not coming on. That is a issue within the tv. Give sharp a call and they will have somebody come fix your tv free of charge, if they cant fix it, they will replace it for free. That is the only thing you can do. Sorry bro