Toshiba 46BL702B - no sound. What is a code to service menu ? I want reset system.

The error message you're encountering could be due to several reasons, some of which are:

1. Incorrect service access code: Make sure that you're entering the correct service access code. In some Toshiba copiers, the correct service access code might be different from #1048#.
2. System lock: Some Toshiba copiers are designed to lock after a certain number of incorrect login attempts. If this is the case, you'll need to wait for a specified amount of time before attempting to enter the service access code again.
3. Service access mode is not enabled: The service access mode might not be enabled on your Toshiba copier. You may need to contact your Toshiba dealer or service provider to have them enable the service access mode for you.
4. Technical issue: The issue you're encountering might be due to a technical problem with the copier. In this case, it's recommended to contact a Toshiba service technician for assistance.

If you continue to have trouble resetting your Toshiba copier, it's recommended to contact Toshiba customer support for further assistance. They should be able to provide you with more specific information regarding your specific copier model and the issue you're encountering.

I am assuming you have already tried leaving it unplugged for 15 minutes and then trying to restart it. Does it work in the TV mode? I.m not sure if there is a rest button on that model. If you go to Toshiba Support there might be more info.

There are two types of reset to TVs. The first is simple to do; a Hard Reset; and the other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight; will be better. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.
To do a factory reset, you should have to enter its menu; and for that you have its original remote control. If you haven't it; it will be best to contact the authorized service center for Toshiba.

Try a reset to this TV and check. There are two types of reset to TVs. The first is simple to do; a Hard Reset; and the other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight; will be better. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.

If your menus are working, it sounds like your input board is not functioning.
As the menus work, you might try using the reset command.
It is on the System Status/System information menu. You have to toggle to it once the menu shows you the firmware version on the Tv.
Might reset the board and get the inputs working again.
Best of luck with what will likely be your last toshiba product (I know mine will be the last item with a Toshiba name on it in my house).

To watch anything on the Tv it needs a signal source, which is either via an aerial or a broadband service provider like Cable network like Time Warner or Satellite dish or even fiber optic service provider like Verizon.You cannot use your TV without these signals. So you do need an aerial to be connected to the TV.

Do a hard reset to this TV, and then check. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.

Try reseting the TV, if still doing the same contact your retailer for a Repair.

To reset Toshiba TV:

Start by pushing the "Menu" button on the remote and going to the "Set-up" option.
Then scroll down to the "Installation" option and press the "Enter" button on the remote.
A new set of options will appear. Highlight "System Status" and click "Enter", then scroll over to "System Information" and press "Enter" again.
Use the left and right arrows to get to "Factory Defaults." Enter your four-digit PIN code or press "0" four times if you haven't set it.
Then select "Yes" and press "Enter" again.
The TV will turn off. Unplug it and then plug it in again. The TV will then be reset.

Unplug the TV for some time (usually 1hr is plenty) and it should reset to factory settings.

Found this on the www.toshiba.com website. Q. I have sound and no picture with the TV powered on?
Models: 26HL47, 32HL17, 37HL17, 42HL17, 32HL37, 26HL67, 32HL67, 37HL67, 42HL67, 42HL167, 47HL167,
52HL167, 42LX177, 46LX177, 52LX177, 57LX177
REF:FAQLCD00111
Using the buttons on the TV itself (not the remote control), press the “MENU” button to see if the TV’s MENU appears on
the screen. If the MENU does appear on the screen, verify that all of your video connections are secure on the TV and on
the connected device. Double check that you are connected in the appropriate jacks, check the other inputs of the TV to
see if the video appears on any other input. If you still do not see any video but can access the menu, try to reset the TV
to the factory defaults.
1. To reset all settings to default values:
i. Press the “MENU” button on your remote to open the menu.
ii. From the SETUP menu, highlight INSTALLATION and press “ENTER”. A new set of Installation
menu icons will appear.
iii. Open the SYSTEM STATUS menu, highlight SYSTEM INFORMATION and press “ENTER”.
iv. Press the LEFT or RIGHT arrow to scroll through the menu bar to select FACTORY DEFAULTS.
v. Enter your PIN code (or 0000 if no PIN code has been set).
vi. Highlight YES and press “ENTER”. The TV will turn off automatically after a few seconds. After the
TV turns off, unplug the TV power cord and then plug it in again to complete the reset process.
vii. If the MENU does not appear on the screen, try resetting the TV by unplugging the power cord for at
least 3 minutes.
viii. If neither of the above steps resolved your problem, you can get assistance with this problem by
contacting our customer solutions department at 1-800-361-3811 Monday through Friday 8am -7pm
CST I hope this helps you with your problem.