Magnavox model 46mf440b/f7 won't power on

SOURCE: tv has an advertisement that wont go off

Press the up and down volume buttons on the TV at the same time. This will turn off demo mode.

SOURCE: tv won`t turn on

replaced power supply

SOURCE: no sound, no picture. tried unplugging and

check your h-out transistor, in high voltage area, capacitors and resistors, need reservicing and resoldering....hope you can do it, or check out with qualified tech

SOURCE: Magnavox MODEL # HD1905 C121

on the set press and hold the up and down volume buttons together till the tv turns off then press power to turn back on and everything should be fine

SOURCE: My Magnavox plasma screen tv, model number:

You either have a cold solder joint in your horizontal deflection circuits or your or in your horizontal output circuit. please be careful due to the fly-back transformer still holds power even unplugged until you discharge it.( ground it out). Hope this helps.