Magnavox 19MF338B/F7 TV fine yesterday, today no picture

Is there a person in your environs who is mischievous or prone to malfeasance? Someone may be using a TV-B-Gone on you. Check this out:
https://cornfieldelectronics.com/tvbgone/tvbg.home.php

Check its backlight inverter board. If you wish to get more details, check this site. Pull up older posts there. Check the site with patience, as it has over 2300 posts now. All are related to electronic equipment repair help. Search the site by 'Timeslide' option. It will make search easy. Or, type in the brand name to your device into its search box, and press "Enter"

Go to page EN-23 of the link for instructions.

http://download.m4c.magnavox.com/files/1/19mf338b_27/19mf338b_27_dfu_aen.pdf

Do you have a digital converter box. If not, you need to get one to receive the analog channels.

The manual is available online as a PDF; go to the site below and click view to download.
http://www.m4c.magnavox.com/cgi-bin/dcbint/cpindex.pl?scy=US&slg=AEN&cat=FLAT_TV_CA&sct=LCD_SMALL_10_20_SU&grp=TV_GR&session=20090725064641_66.249.66.5&ctn=19MF338B/27&mid=Link_UserManuals&hlt=Link_UserManuals

You can print it out after downloading; it is 35 pages long.

I hope this helps.

Cindy Wells

Hi my name is Roety,
I can help you with your issue ,
You can check the setting for stereo/sap must be set to stereo
If all connections are good and the problem is inside the Tv you will need a new mainboard (or SSB, scaler), ck encompassparts.com 　
　
　
If I have helped you with your issue
If you have more questions you can still respond
I will reply asap
Thanks

I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771

TV may need software upgrade. Go to menu, find instalation, find software upgrade, find. If version is bellow FL2D-r23 (#23) TV needs upgrade.
Get upgrade on the internet onto a USB flash drive. The file may be a ZIP file, if so, unzip to a folder in PC then put the file to the USB drive.
Turn TV on, plug in the USB drive, wait til the upgrade is finished. Unplug USB drive, turn TV off w/remote.
The TV will then turn on by its self and the upgrade is complete.
Hope this works

check the vertical section,look for burn resistor or try replacing the vertical ic.

how fried it is
ever find a fuse in an lcd ????
over heated lately ?

Hi and welcome to fixya, it is the colour wheel problem,,,,,,,,,this is common problem please check it ...it may be also cathode ray tube... thank u.........