I phone will turn on screen is locked and so is navigation button

You can factory-reset , your phone through custom recovery
what means you can bypass the sign-in problem you have .

NOTE : YOU WILL LOSE ALL YOUR DATA SAVED ON THE PHONE STORAGE !!!

how to : you can go to factory reset by clicking and holding : volume up , home button and power(lock)button simultaneously

soon as you see the logo on you screen you can remove your finger from the Power(lock)button and then you will enter the custom recovery mode , there you can navigate using your volume buttons .
Navigate to Wipe data , Factory reset hit the power button (or home button ) to select , on the next screen navigate to YES and select
wait for it to finish , and hit Reboot .

that's it you shoud be fine .

when ever you forget the
pattern lock and can't access the
phone, below is a step by step guide
on how to reset it.

1. Switch off the phone by pressing and holding the power button.

2. Now, press and hold the power button and the volume down button
(Power-on + Volume down button)
together until the phone has power on.

3. On the next screen that shows up, you should see about four ( 4 ) options, scroll down to "Factory Reset" or "Clear Flash" and select it. (Use the " Home button" or Switch button to select).

4. On confirmation, the factory reset process begins immediately. And,
when the process completes, the
phone boots up without the pattern security lock.

TIPS: For navigation purpose to explore
other options on the screen, you can
use the (Volume Down key) to
navigate down, the (Volume Up Key)
to navigate up and the (Home Key)
to select the option you want, you can use (Switch button) to select in some android phones

You can try turning off your phone and and then while turning on hold the power button and volume down in order to enter recovery mode. Once in use the volume keys to navigate to reset option. To press select use the power button.

Install an IR Remote App in android phone. The app link below worked for me to remove the fpa lock on. Configure the App for your RCA TV. Set TV as Device type, RCA as the brand. and choose the model (e.g., TV 20 F420T) also, select the Alternate IR Driver.

All the options of the command may appear in a list form. Close that and an actual remote with buttons should appear.

Then Power your tv will turn ON. Press the Menu. Pressing the Channel Down/Up Button to navigate to Preferences. Press OK button on the screen.. Then Navigate to FPA Lock. Press OK again. THis will turn the FPA Lock to Off.

Then you could use your on-TV buttons ZappIR Universal IR Remote Android Apps on Google Play

MY SCBIXDB

DEAR IF THERE IS NO PROBLEM WITH FLEXI CABLE THEN THERE IS SOFTWARE PROBLEM,TRY TO FLASH IT

Repair Procedure
1. Confirm the customer's complaint of DVD RSE system inoperative.
2. For vehicles with Lexus Navigation System, perform the following procedure to turn OFF the RSE Lock function:
A. Press the INFO button to display the "Information" screen on the navigation unit.
B. Press the "Screen Setting" touch button on the navigation display.
C. Under the "Rear Lock" option, press the "OFF" touch button and then press "OK" in the upper right part of the display.
D. Press the DVD switch on the RSE system, (If a DVD is NOT already in the player, insert one) and confirm screen is "ON" and the system will play DVD's.
3. For vehicles without Lexus Navigation System, perform the procedure to turn "OFF" the RSE Lock function.
A. Push the audio control knob multiple times to cycle through the various options (Bass, Mid, Treble, etc.) until "Rear Lock" is shown on the screen.
B. Turn the audio control knob so the display says "OFF" next to "REAR LOCK".
C. Press the DVD switch on the RSE (if a DVD is NOT already in the player, insert one.) and confirm screen is "ON" and the system will play DVDs.
4. If the above procedure resolves the concern, explain the system operation to the customer. This procedure is described in the "Audio/Video" section of the vehicle owner's manual.let me know lf this helps.

It is actually located behind the navigation screen.

Turn off the radio.
Press and hold the CD eject button until the display unlocks (about 10 to 15 seconds).
Let screen move outward and rotate downward.
Press the DVD eject button just exposed behind the display.
Remove DVD, insert new one.
Rotate display upwards and press gently on all four corners to slide and lock display back into original position.
Turn on radio, navigation DVD should start update process, let it finish.

A. Turn on phone with full battery and non-T-Mobile SIM in place.
Allow phone to completely boot up to Wrong SIM screen. B. Enter from Wrong SIM Screen *#7465625# to confirm lock status C. Scroll through Interrogate Screen 1. Network lock - Active (this is the one you'll be deactivating)
2. Subset lock - inactive
3. SP lock - inactive
4. CP lock - inactive
5. SIM Card lock - inactive
6. Activa lock - inactive
7. Auto network lock - inactive
8. Auto subset lock - inactive
9. Auto SP lock - inactive
10. Auto CP lock - inactive
11. Auto SIM Card lock - inactive
12. Phone lock - inactive D. Push "C" button under navigation button to clear Interrogate screen back to Wrong SIM
screen E. From the Wrong SIM screen enter the following: *7465625*638*00000000*00000000# Those are two series of eight zeros. The phone will not show the zeros but will show dashes in their place. Phone may make a small tone and at the bottom of the screen it will read "Network Personalized" or perhaps "Network Already Personalized" F. Now input the following from whatever screen shows up: #7465625*638*00000000# (again this is a series of eight zeros) Phone may make small tone and will read "Network Lock Deactivated" G. Turn off phone
H. Re-start the handset and allow it to reboot.
J. Enter from Standby Screen *#7465625# to confirm lock removal status K. Scroll through Interrogate Screen 1. Network lock - inactive (note that this lock is now inactive)
2. Subset lock - inactive
3. SP lock - inactive
4. CP lock - inactive
5. SIM Card lock - inactive
6. Activa lock - inactive
7. Auto network lock - inactive
8. Auto subset lock - inactive
9. Auto SP lock - inactive
10. Auto CP lock - inactive
11. Auto SIM Card lock - inactive
12. Phone lock - inactive
That's it. Your phone is ready to accept SIM cards from just about any GSM mobile telephone service provider in the world. If you received a "wrong password" message you will need to insert a working SIM and reset the password to the default 8 zeroes "00000000". After that you may try this process again and it should work.

its need new key pad