Question about Hitachi 51S500 51" Rear Projection HDTV-Ready Television

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HI, I have an old June 2003 Hitachi 51S500 , that i have been trying to unlock for a friend of mine , She said it just started showing one morning . am not sure what kind of lock or what it is All it says it "lock" on the screen and when i key in numerous digits it says "stop". .. it shows some kind of grids on screen. it has a hitachi remote with it . CLU 5728751 but i am noy sure if its the original remote or not If anybody has a solution to this please help , i have been trying to get this unlocked for a while now . thanks a lot

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  • ashish_obero Mar 14, 2011

    So can this be fixed, if yes, whats the approx cost that it would take ? do you think its a kind of parental lock.

    Ps. i am ready to pay a little if you can provide me with adequate solution, and if the tv starts functioning again



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Hi this is a problem with the main board clearly

the fact that it is not allowing a code and also the fact that it is asking for a code that was never put in on the first place this shows that the main board has a fault and is causing the controll unit to send out a locked message that cant be unlocked it is not possible

solution:new main board

Posted on Mar 14, 2011

  • arron somerville Mar 14, 2011

    well it is a type of parental lock that can be usally turned off and on but the problem is it is active and stuck on also even if this was just set and forgotten replacing the board would be the only solution as nobody can unlock these

    it can be fixed and i can guarantee a new board will solve the problem here is where i buy my parts but i cant seem to find a board so you will have to look around Ltd/Hitachi/51S500.aspx

    also it will cost under 100 dollars prices vary for rarer items



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Here are some of the most common symptoms and example photos of a convergence problem

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You need to replace the convergence chips and convergence resistors. Check the site They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

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