Hi friends ....
I thought this one was going to be straightforward ...but its turning into a nightmare.
My customer complained he had no freeview channels ...which was true ...but not just missing channels ...missing menus ...so couldn't perform a re-scan
When the dvbt button is pressed ..I just get a blank screen ..
Analogue is fine as is an external source on EXT1 or EXT2
So ..back removed and psu board examined ..
2 x leaky electrolytic caps ...
These were both replaced ...as was the 24C32 eprom ...
New blank 24C64...
The set bas powered up ..and the new eprom written ...but still no dvbt/freeview..
I borrowed a pretuned (channel map already stored) dvb board from a 42 inch Samsung ..
Popped this on the main board edge connector ...and was rewarded with a picture ....well several ..as the channels were already stored ..
Back came the dvb menus ...but a poor picture ...so ..I did what you'd expect ..and went into the service menu ...and performed a reset ..
This had the effect of disabling the dvb menus and wiping the channel map ...so now I have 2 non performing dvb pcbs
Im convinced this is an options problem and that the tuner which is on the main board ..not the dvb board ..is not identified correctly ..but cannot find an option to switch it on ..
has anyone encountered this issue before ..
Possibly corruption of the stored option bytes by ota upgrade ..or faulty psu ..
And has anyone got a service manual for this model ..or similar that I can use to research the options.
Failing that ..has anyone got access to one of these specific sets ..and can access the service menu ...and make a list of the correct option settings that relate to the tuner type
Any help would be appreciated ..
I cant even find a reclaimed main board on ebay ..
at least not one at a price that would make the repair economic
rgds
E Parton
