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Strange colour problem , Ferguson FL15DX5 LCD tv

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ProDave:
This one's got me stumped.

It's a small 15" ferguson LCD tv with built in freeview. I've fixed the original, tripping PSU problem only to find it has a strange colour problem.

Everything is fine on analogue tv , the composite AV inputs and PC VGA input.

But, when you switch over to DTV mode it has an obvious colour fault, everything has a strong purple colour. This fault is also evident if using the scart input from an RGB source

At first glance, it looks like no green, but it's not that simple. Whites are white, so green is there. But what should be black is purple. So anything in between gets progressively less green, the darker it is if that makes sense. Turn the colour right down and it's a perfect black and white picture.

Is this a know fault or anyone got any ideas?

Clearly it's not worth spending much time or money on this one but it's more a case of not wishing to be defeated.

I've searched the net and found mention of this very same fault, but with no resolution being found.

daz:
this sounds very similar to a common fault on the samsung lcd tvs, where after psu is repaired the analoge pic is fine but the digital pic has a green tint to it but the digital menu is fine, all this is caused by a corrupt eeprom.
hope this helps
daz

ProDave:
Thanks daz.

That might help, if only I could find a service manual for this set, or at the very least find the sequence to access the engineers menu's and some information on at least some of the parameters.

Anyone know this information?

ProDave:
Another bit to this one.

I've not done anything with it for a while, but had another go at it today.

I still can't find how to access the service menu's?  But what I did find is holding down the "menu" button while powering up puts it into "debug mode" But apart from saying "debug mode" in the top left corner, I haven't found anything usefull that it will do in that mode.

Another interesting test, I connected a scart lead from this set to another tv.  The other tv displays whatever is on the screen of this set.  When in "DTV" mode, the other set displays a perfect picture from freeview.

So the fault is not with the "freeview receiver" in this set, it purely lies with it's inability to correctly dispaly an RGB source (which must be how the internal freeview decoder is linked to the rest of the tv)

Any more ideas anyone, particularly how to access the service menu's?

norman:
Hi, only info I can find, to enter service mode, press menu on remote control and front panel simultaneously, to exit service press standby. Please make a note of settings in service mode before you change anything. Hope this helps, Norman

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