How do I unlock the 'panel lock' of my Toshiba Regza without remote control?

Question edited for clarity.

This is generic help because you don't state the model. You have to do Link Setup first, then the options should become active.

Regza-Link Setup; Hdmi Settings - Toshiba Regza 32CV510U ...

https://www.manualslib.com > ... > Owner's manual
Using The Hdmi Settings Feature; Regza-Link Setup; Hdmi Settings - Toshiba Regza 32CV510U Owner's Manual ... and press T. ... Press B or b to highlight Enable REGZA ...

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You may be able to turn the Panel Lock feature off by pressing the "Volume Down" button on the front of your TV for more than 10 seconds. Save your PIN code in a secure location where it is accessible only to you or other authorized persons.

How to Unlock Panel Lock on a Toshiba TV ' Techwalla

Without a remote control, you can't. If you wish to buy its original remote control, contact the authorized service centre, or authorized dealer to your device brand. They can either give you a genuine remote control to your device, or can direct you, from where can you purchase a suitable one.
To select a proper universal remote control, you should know about the number of digits to its set-up codes. There are 3 digit, 4 digit, 5 digit, 2 digit and even single digit codes, to some brand devices. After confirming this, check the sites linked here. All the sites have set-up code list and set-up procedure to many popular brand remote controls. Check which brand remote control has set-up code/s to your device brand, and buy that one according to availability. Brand name of the remote control isn't a matter, but it should have set-up codes in its code list, to the device brand you have.
Please note: Every new universal remote control will have set-up code list, and set-up procedure along with its pack. Never accept a remote control, that hasn't both of this. For more details about the set-up codes, visit the site
http://electrohelponline.blogspot.com/ Check these sites too. http://remotesearch.blogspot.com/
https://elektrotricks.blogspot.com/
Universal remote controls are available at most of the electronic spare part selling shops; as well as online shops.
Visit the sites by Desktop computer and type in the brand name of your device in the search box at the right column. It will help you find the remote you have to buy. Mobille view has no search

PDF]BT Vision remote control TV code list A - BT.com

www.bt.com/help/codes

BT GroupBT Vision remote control TV code list ... If your make of TV isn't in the list, pleaselook for the code you need in the installation manual of your TV. 888 ...... Toshiba. 0011 0688 0002 0009 0005 0000 0049 0642 0646 0190 0727 0748 0006 0018 ...

Remote control code for Toshiba Regza 42rv530u - Verizon Forums

https://forums.verizon.com/...Programming/Remote-control-code-for-To...

Apr 12, 2010 - Remote control code for Toshiba Regza 42rv530u. Options. Mark as New ... to find a working code. Please write back if I can assist you further.

I need help finding remote control program codes for Toshiba Reg

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/
Unlock procedure and to override the password lock to many popular brand TVs are given.

Look on page 52 of owners manual.
http://www.manualslib.com/download/172643/Toshiba-Regza-42lx177.html

read the owner manual, the book that came with the set--it is telling you the panel or front controls for the set (maybe the remote also) are locked to prevent them being used, there will be a method to unlock them in the owner manual

It will be very difficult to access most of its functions without its original remote control.

This may not be possible; it may be designed to prevent children from operating the set without an adult with the remote present.
You can probably buy an original remote or a known substitute from:
Remotes.com

Go into your user menu and then to setting or parental control. You should see an option to lock and unlock your panel.

Yes,must use the manual control on the tv itself.Very trouble some.Buy a new exact remote on website 1-800-Remotes Factory Original.