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HG55EB690QB Bootloop issue ...

Posted: Sat Dec 08, 2018 10:34 am
by jpk
Hi All

After having changed my TV options/settings through the service menu, it does not work properly anymore (bootloop mode). This TV set is part of a “hotel/hospitality” series. I’ve used this menu many times but this time I obviously did something wrong …. And I cannot enter the standard menu nor the service menu to perform a factory reset .... (remote control and small joystick in the back of TV set are not taken into account anymore during the bootloop)

Is there a way (simple way ...) to reset the eeprom ? or to boot on a USB stick with a fresh firmware please ? Or any other possible solution to have it back again ?

Many thanks in advance

Re: HG55EB690QB Bootloop issue ...

Posted: Sat Dec 08, 2018 6:50 pm
by juusso
Open back cover, check mainboard and identify eeprom. Do reset stright on board. Easy, if you know what chip it is.

Re: HG55EB690QB Bootloop issue ...

Posted: Sat Dec 08, 2018 9:11 pm
by jpk
Many thanx Juusso
I've opened the back cover
I've indentified the main board
I think I've indentified the eeprom chip ....
Image
Can you please tell me if it's ok ?
Now I do not know how I must do to reset it .... shortcut or something ? can you please help me with the exact procedure

Many thanks in advance

Re: HG55EB690QB Bootloop issue ...

Posted: Sun Dec 09, 2018 10:32 am
by juusso
Could you please show whole mainboard, not only that piece with probably correct chip?

Re: HG55EB690QB Bootloop issue ...

Posted: Sun Dec 09, 2018 10:37 am
by jpk
Yes of course
thank you
Image

Re: HG55EB690QB Bootloop issue ...

Posted: Sun Dec 09, 2018 10:41 am
by jpk
Maybe this one is better quality (with zooming capability) on this site (my board is the same with exact same refernces)
http://www.lcdtvyedekparca.com/bn94-063 ... d-ana-kart

Re: HG55EB690QB Bootloop issue ...

Posted: Sun Dec 09, 2018 5:12 pm
by juusso
Your first photo is awful, i can not read anything there. Could you re-take it with same or better quality? Need to read labels on it...
Board you refering has poor quality pictures, not useful.

Re: HG55EB690QB Bootloop issue ...

Posted: Mon Dec 10, 2018 6:45 pm
by jpk
Sorry Juusso and thanks for your time
Are those better ?
Image
Image
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Re: HG55EB690QB Bootloop issue ...

Posted: Mon Dec 10, 2018 7:48 pm
by juusso
What is exact label of IC1804?

Re: HG55EB690QB Bootloop issue ...

Posted: Mon Dec 10, 2018 8:27 pm
by zoelechat
You should take a better close up of the top left, there are EEPROM_stuff labels/pins.
Then read from there