Annoying ratio switching..?

[Timotei]

Hello.

I have an Hitachi LCD HDTV, and a JVC DVD/Cinema combo, and by a sheer stroke of unluckiness they are incompatible with each other, I get interference during DVD playback as you can see here:



I took both items to the shop I bought them from for testing and "incompatibility" was the only thing they could come up with. The guy doing the testing said that just about the only thing he could do was to butcher a SCART lead leaving just the RGB and audio pins connected, disabling everything else. This he did and it works just fine, no more interference.

BUT.

As the thread title suggests, I get annoyingly random ratio switches when watching either cable or DVDs... normalSTRETCHnormal... you get the idea. This isn't happening constantly, one switch every 5 minutes say, though some programs/DVDs are worse than others.

After doing a bit of Googling, I find that Pin 8 of a 21-pin SCART lead, is the connector that instructs a TV to switch to AV when a DVD player is turned on, but also handles ratio switching. AHA thinks I, if I just reconnect that pin, I should be laughing. Then I realise that my TV /does/ switch to AV when I turn on my DVD player, so this pin /must/ be connected right?

So what else could be causing these ratio switches?

All ideas welcome, and thanks for reading.

Oh, my DVD only has SCART output, so other cable types aren't an option unfortunately.

[Krispy Kritter]

I would first connect/use another DVD player with the TV. If the problem continues, you have a TV issue. If the problem stops, you have a DVD player issue. Either way, the problem is most likely hardware related. If you can find out which component is having the problem, you will know which one to repair/replace.

[Timotei]

Both appliances have been tested with other units, neither appliance is faulty, it's just a one in a million stroke of luck that these two specific models have a problem with each other.