Samsung service menu problem

Hello,

I'm wondering is someone can help with this issue. I was unfortunately
going through the service menu of my Samsung TX-R2435 (to see if I
could find any hint of a "wide" mode, which is advertised everywhere
for this TV, which I bought used) when I hit an option that I shouldn't
have touched. Actually I didn't think it was a command but an access to
a sub-menu. Anyway, it was called "bus stop" and what it did is
actually deactivate all controls in the TV (as well as the service menu
itself). I had to unplug it to get it to turn off. Now, when I try to
turn it on again, the light goes green as normal but then turns off
after one second and the TV remains blank (it does "charge up"). I have
tried leaving it unplugged for 4 hours but it didn't reset anything
apparently. It's as if it is locked into a perpetual state of going on
stand-by.

Does anybody have any idea on what is happening and how to fix it.

Thanks!

 

It is possible for you to lock out the initialization of some of these sets.
The Samsung sets are normally set up with an external interface. The type
depends on the models series. Take the set to an authorized Samsung dealer
to have the EPROM firmware initialization re-set.

--

JANA
_____


<LeChuck> wrote in message
Hello,

I'm wondering is someone can help with this issue. I was unfortunately
going through the service menu of my Samsung TX-R2435 (to see if I
could find any hint of a "wide" mode, which is advertised everywhere
for this TV, which I bought used) when I hit an option that I shouldn't
have touched. Actually I didn't think it was a command but an access to
a sub-menu. Anyway, it was called "bus stop" and what it did is
actually deactivate all controls in the TV (as well as the service menu
itself). I had to unplug it to get it to turn off. Now, when I try to
turn it on again, the light goes green as normal but then turns off
after one second and the TV remains blank (it does "charge up"). I have
tried leaving it unplugged for 4 hours but it didn't reset anything
apparently. It's as if it is locked into a perpetual state of going on
stand-by.

Does anybody have any idea on what is happening and how to fix it.

Thanks!

 

It seems an EEPROM for that TV costs about $6. If changing it would fix
the problem maybe I could just go ahead and do it myself, but what are
the chances of it being actually the problem? I actually did not enter
the "EEPROM" submenu in the service menu.

 

This is exactly why we warn customers about not to attempt using the Service
Only Menues on their products.
I understand, you did purchase the product, do own it, therefore you have
the abosolute right to destroy it in any matter you prefer. However, when
you request information as to how to un-do your FUBARD and do not choose the
obvious recommondation, then we are at a loss to assist any further. Order
the E-Prom, hopefully it comes with the proper programming code already
loaded, hopefully you do not flack it with ESD while attempting to change
it. Enjoy!!

 

I''ve been a computer specialist for 12 years, have already done some
electronics stuff (following how-tos), and I've setup many things
including CRT projectors and the like. I'm fairly accustomed to go into
service menus, and also accustomed to tweak things that should already
properly work out of the factory.

In this case, I'd ask how good is a "self-destroy" option in a service menu.

I could already figure out the "take it to a repair shop" part without
posting a request for help. I post in order to find something that I
can do *myself*. I don't want to pay $100 to replace a $5 component in
a TV I paid $50.

 

Yeah, I've tried that. No all the buttons, but I've tried holding the
menu button, and I've also tried holding some buttons while pulling the
TV back in. I'm going to try to do that a few more times and then I
guess ask a local repair shop if it doesn't work out.

Thanks.

 

have you tried holding some buttons in while hitting the power switch?

 

The service manual for the KS7A chassis is here:
http://www.eserviceinfo.com/download.php?fileid=15342

Unfortunately it's not very helpful.

In the absence of a secret reset key sequence, I'd be attempting to
reprogram the EEPROM chip (24C16) by hand using the settings in the
manual, but then I have an EEPROM programmer.

- Franc Zabkar

 

The EEPROM stores all the settings for the TV, including user settings
such as the tuning voltages for the TV channels, brightness, contrast,
etc. That said, I don't see a setting for "bus stop" in the service
manual. In any case, I don't think you can just replace the EEPROM
with a blank one, assuming that's what you had in mind. Then again,
maybe the uP contains some default parameters that can bootstrap a
blank EEPROM ...

- Franc Zabkar

 

That's what I thought. There must be a simple way to recover from this
scenario otherwise the design is flawed.

As a technician, I find it annoying that service information is often
only made available to select service agencies, and not to the wider
third party service community.

- Franc Zabkar