I powered the TV up the first day I got it, and I noticed a line on top of the TV's picture, so could it be a bad transistor or horizontal output tube? Image Link

Assuming this is a coloured set, the one pictured is unlikely to have any valves aside from the picture tube itself. I've been told that only one comany made a coloured valve telly in Australia and it was not in production for very long - this may have been HMV.

Vertical size usually relies on the correct voltages being available in the circuit. This is evident when during a brief brownout of the mains voltage or running a telly from an inverter that only generates 230 volts or outputs a stepped squarewave instead of a sinewave the picture is smaller than normal.

Your problem could be a dirty vertical size potentiometer, open circuit resistor, dry joint on the PC board, etc. I don't think a transistor will be at fault - semiconductors don't die slowly like valves, they either work or they don't.

If you didn't ? Not a good idea to power it without having a good look at it, if you don't know the history.

Anything could have been wrong with it & it is amazing what fauna you can find inside an unused set.

I actually had an oscillator issue with a recently restored (at the time) Philips radio. There was a large Arachnid that had created a short(ed) wave coil and there was wildlife inside a Radiogram I scored to fix, after it fried the back bias. The wildlife can and has, become a HV short.

Marc

The TV says AWA on the back. but the mains here are fine, so could it be a faulty coil or Transistor

Could be a coil but not likely. Could be a capacitor, resistor, dry joint or even the yoke on the neck of the picture tube. It if becomes detached it'll steer the picture out of alignment.

Thanks dude, I will make a better quality video because I have one on youtube. http://www.youtube.com/watch?v=4nL_I_pvEOE.

Somewhere burried in boxes being prepared for shifting (eventually) is a book on colour TV faults & how they appear on the screen.

I also have (somewhere) one of those old charts for the valve jockeys, to give an indication of which valve might have caused the fault in the (B&W) picture.

Marc

My AWA TV is from 1973, The only fault it had was Vertical Collapse, The way I tested whether it was the Yoke or Vertical Driver was to hook up a Multimeter to the Deflection coil plug and check voltage at the Vertical coil source, then check the Frequency, which were both fine!, next test was to do a Continuity check on the Vertical coil on the Yoke, it was Open , so off I went and stripped it down and found a burnt wire on the connection to the winding, resoldering a new piece of wire fixed this problem!, Note:, 1973 onwards, AWA TV's were rebadged Mitsubishi's, and Rank Arena was a Rebadged NEC!

Well I think this TV is much older, I cant find a date to be exactly sure, but it said AWA on the back

Is there a model number near the brand name? Does it have valves or transistors? Is it colour or B&W?
Check all supply voltages for voltage and ripple starting with the B+.
If it is a vertical fault, you have the vertical coils, the vertical output transistors, the vertical oscillator and the vertical synchronization pulses. If you are not inputting any video then sync pulses are not present and the oscillator is free running. Check the timing circuits around here.
A model number or more information would be helpful.

p.s. Sorry, I see this post is months old.
We need a delete button in our 'Edit Post'.