Magnavox TV GR1AX Chassis Start Up Problem?

Okay then , here is the method that I would employ in your position ! first you want to know where the fault is located , Power supply or horiz amp section , this a fast track method used by many experienced hands ! Okay switch the set on and wait about ten minits or so , of course you will keep an eye on while doing this . Now switch the set off and put your finger on the power regulator device be it an IC or a power transistor , is it warm ? it should be moderately warm but not enough to burn your finger ! right then if it is warm then it indicates that the device is working ( device good ) if cold then the power supply is not operating and will not have received a start pulse from the PS start capacitor which will be a low value cap between 1mfd to say 2.2mfd at 400volts working ! This is an extremely common failure component and it usually loses its value ! It is often then the case that the cap will start the PS ok from standby but when you switch the set off at the wall the cap will fail to start the supply with it its lowered value.

Now if still nothing to celebrate then move to the line amp transistor 2SD 1650 , same question is it warm ? ( not red hot ) then it is likely that is also ok plus the damper diode inside .

Okay then enough for now , if no results then we will move to some voltage measurements next time !

Cheers Pete