Power Shut off today and my Sharp LCD TV no longer works any way i can repair it im a DIY

Fault to the main power supply regulator section. 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://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.

It can be that it detects shorted circuits so it goes into shutdown, or ity may have bad power supply due to bad caps, oe bad main board. it will require in-depth troubleshooting to narrow down the problem.
Please read my guide first if you are going to DIY repair.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:
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
Parts: www.interliquidparts.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.

The 5vdc power supply is working but not the rest of the set.
You need to check 24vdc power supply section and also the backlight inverter circuits.
Do you still get sound?
You can learn more about LCD TV in my guide so you can decide if you will want to DIY repair or not.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

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
Failed TV and Monitors: 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.
Please post back what you find.

Do you get sound when hooking tv to a receiver with speakers? If so it could be a connetion problem or the sound board is going.

It is detecting failed circuits and stays in the safety shutdown mode, it will be in-depth troubleshooting. Please read my guide to understand how LCD TV works, then you can decide if you will want to DIY repair or not.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

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.

Please post back what you find.

This is usually some sort of power supply shut down problem the TV has detected a major fault, and has shut down the power supply to avoid a fire or explosion.. you need to get this unit serviced by a reputable repairer also always ask for a 'Quote: so you know weather to repair or replace.

is the OPC light blinking also if it is the tv neds to be reset by a certified shop. OPC is an engineering flaw from Sharp and conflicts with other software in the tv.

I had this problem on a sharp flatscreen lcd. the audio output i.c. was a surface mount chip-had to change complete signal board assembly,

It is always irritating when a TV stops working. Most likely it is a board failure. The service tech should be able to service this by swapping out the failed board(s).

Jerry G.

No picture blak screen