Question about Sharp Aquos LC-37HV4U 37 in. LCD HDTV

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Sharp LC-37HV4U not turning on

Good evening, i have this unit and it doesnt wanna turn on. All i see is the red light blinking and nothing happens. Sometimes when i press the power bottom stays steady then flashes.

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  • Anonymous Dec 16, 2007

    same exact thing

  • thomasts May 27, 2008

    help ~~~ anybody has solution, pls help

  • diefromxxfor Jan 21, 2009

    is there any way to fix this at all.. the 1st and 2nd solutions sound lame and didnt work either

  • Anonymous Mar 21, 2014

    does sharp have software updates for the lc-37hv4u and how to install



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Hold down the input button and volume - while the MAIN POWER BUTTON IS OFF. Then turn on the main power button while those are held down, the light on the tv & avc box will turn green, then immediately let off the 2 buttons and press volume +. Next step is to repeat the process about 20-40 times & the TV WILL WORK!. I have read that this may have something to do with the energy star compliant commads that can changed through the serial port.

Posted on Aug 03, 2008

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Thank you, psxpirate25!!!! It worked. I had to repeat it about 35 times. It came up in a factory setup firmware mode. I could see the video behind it. Pressing buttons on the remote only switched between the settings menus. I power cycled it a couple of times and had to do another 35 times. Finally it worked! Totally awesome!

Posted on Aug 13, 2008

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  • AirmanB29 Aug 14, 2008

    Well, that was last night. Tonight, tried to turn it on with the remote and it is doing the same thing again. Tried the power button thing again, but it does not work this time. It worked for a few minutes, but as soon as I turned it off, it was lost. Seems like the control box is doing some kind of flaky firmware thing.

  • AirmanB29 Aug 14, 2008

    There sure are a lot of people having the same problem with their Sharp TV. I don't think I will ever buy another one again!!

  • AirmanB29 Aug 15, 2008

    OK. Here seems to be a solution that is working now. Unplug both the
    AVC and the panel (I used a power strip to make this easier by just
    turning off the strip and back on again). With the AC removed, press
    the "MAIN POWER" on. Next, press and hold the "VOL (--)" and "INPUT" at
    the same time. Finally, plug the AC power back in and the set should come on.

    After it came on, mine was in a factory test mode. I had to enable the
    write mode (I think it writes to the PROM) and then selected the second
    line down on the first menu (1 of 15 ) to have it do the restore or

    Finally, my set came up with OPC enabled to auto and it seems to have a
    sensor issue. At night, the monitor is unwatchable with such low light.
    So, I turned on a bright light near the monitor and set that to
    "Manual". so far, for two days and nights now it has been working
    again. I hope this helps. Good luck! -Brad


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I had the same problem with my lc-37hv4u and i changed the following board: Sharp Main Board KB453DE XB453WJ. If your a little handy you can do it yourselfand save $150.00 bucks. The only proble is trying to find a new board, which will cost about $300.00 or if you can search the net and find a used one for much less, but make sure they are willing to take it back if it doesn't work. good luck.

Posted on Dec 25, 2008

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