Sharp 28LF92H power cycling

Guest · Posted: Tue Apr 11, 2006 5:01 am Post subject: Sharp 28LF92H power cycling

Hi All,

I have an Sharp 28LF92H that is power cycling (red/green) LED constantly it has powered up twice but the picture was tilted to one side and as soon as i touched the widescreen mode button on the remote it went into the power cycling again.

I have searched the net for answrs but have seen a few people with the same problem but no answers to this?

I have the schematics but as i`m not a engineer (just hobbiest) i am asking you guys as you are Guru's compared to me Smile

Please help point me in the right direction to fix this as i don`t have enought money to pay for repair.

Thanks

drone · Guest

As a hobbiest I really dont think you should attempt this but I can tell you whats wrong.
IC 602 an EEPROM device is faulty,its not a problem to change but you must obtain correct one as their are many diff variations of how its been programmed and fitting wrong one will make matters much worse,assuming you are still getting a picture and the frame IC hasnt been damaged as frequently happens when EEPROM fails,after fitting EEPROM it will require some setting in the service menu I wont tell you how to get into service menu until you consider the job in hand is within your capabilitys Confused

ShaGGy · Joined: 11 Apr 2006 Posts: 3

Thank for reply drone,

Yes i i am capable of changing the IC, how can i determine which one i need ? (i.e what has been programmed on it).

You say "assuming you are still getting a picture and the frame IC hasnt been damaged as frequently happens when EEPROM fails" i have only tried the tv on 3-4 occasions since power cycling fault appeared and have managed to get a picture twice, when i did have a picture it was fine except the top right hand side of the screen was tilted in about 3", and as soon as i touched the widescreen button on the remote it went into the red/green power cycle.

would the frame IC cause the tilted screen symptoms ?

Thanks again for your help.

sharpy · Guest

could you please tell me how to get into service mode as its the only thing i can find how to do!

ShaGGy · Joined: 11 Apr 2006 Posts: 3

Does anyone have access to the EURAS Internet System (http://www.euras.com)? as they seem to have the answer to my fault (see topic).

Sharpy service menu is:-
enter the MAIN MENU
and then press the digits 4, 7, 2 and 5 respectively or press MUTE and INFO buttons at the same time.
Hope this helps .... beware i don`t know what damage you can do in this mode so don`t mess with it if your unsure.

ShaGGy · Joined: 11 Apr 2006 Posts: 3

egg · Joined: 21 Jan 2007 Posts: 2

did you ever get this problem sorted as the same thing is happening to my set any advice.

DejaVu · Joined: 02 Jul 2007 Posts: 93

Have this set and the screen is 'shaky' has anyone got any ideas what the problem is? Can I adjust something in the Service menu or is a component blown that needs replacing?

Any help would be grateful.

essam · Joined: 21 Oct 2007 Posts: 8

just press menu and frequently press 4,7,2,5 from the remot conytol