Shuts off quickly after being turned on

You can use the 'menu' button on the panel (next to power on my model) to bring up the 'Initial Setup' screen. The factory reset option is available from that menu. You'll need to navigate through the menus using the channel up down buttons and the enter button on the front of the TV.

I'm not certain of the specific model number of your set, but this should be the same for all Sharp Aquos models.

First, navigate to TV input, and select menu
Next, enter setup and select, "ez setup"
In the ez setup menu, select "home", not "store", for television location.

This should turn off the demo mode and solve your issue.

This sounds like a setting that can be adjusted. What I like about some of the Sharp televisions is the av mode setting (preset brightness/contrast adjustments). I am not looking at the manual for this model so I'm not sure if this is an option on this television. However with this being a high end aquos model there is free assistance available to you. You can register your television at aquos advantage and chat live with an aquos advisor at Sharp's Midwest Corporate Headquarters. The agent may advise you to call in if your television need and Industry Initialization because you have to be talked through it. I advise the chat reps initially because when you call you aren't able to speak with the Midwest Corporate Sharp reps unless your call is being escalated.

http://www.aquosadvantage.com

Check the belt of the vcr sistem if they got a little loose change it

this is a capacitor issue , one or more of your capacitors has blown on your power supply.

IF YOU STILL HAVE SOUND I AM PRETTY SURE WHAT THE PROBLEM IS...

you have caused some internal damage you will have to goto a reapir shop.

that means tht u have a faulty stage, probably it's the vertical, and or Xray protection kickin in.
U have to trouble shoot

hi

you have defective power oscillations! in this model you have to replace the vertical output ic. because the power oscillation for Jungle IC is passing by from Vertical output.

Thanks!