I have Advent Q2035A model.
Have color problem, that could be called 'chromatic bullseye'. Large center circle drives one color and corners have complementary color...etc. Unplugged set for several hours, fixed it once. But problem recurs.
*** any hints and suggestions welcome.

Service mode...
I found a way to access SM by chance!
In sequence, press Sleep Pic Display Menu. (the general 'thumbing' for the 4 buttons is Left-Rt-Lt-Rt in case your set is diff model)
Once there, 'Menu' toggles 3 pages of factory settings. Modify via Volume buttons. When a single parameter is displayed, hit '9' for selftest. etc etc)
Exit by 'Sleep' when pages are shown.

Sounds like the degaussing thermister is loose,
or has bad solder in the mainboard. These units
sometimes have a bad EEPROM, & Micro, &
have to be changed together, & are very cheap.
But this is for a lot of strange problems. Be careful
not to foul up the service menu, as you will make the
unit unusable. At least write down the values. Sky.

Service mode...
I found a way to access SM by chance!
In sequence, press Sleep Pic Display Menu. (the general 'thumbing'
for the 4 buttons is Left-Rt-Lt-Rt in case your set is diff model)
Once there, 'Menu' toggles 3 pages of factory settings. Modify via
Volume buttons. When a single parameter is displayed, hit '9' for
selftest. etc etc)
Exit by 'Sleep' when pages are shown.


--
golar

This is most likely a degausing circuit problem. Check the
thermosistor, and related circuits.

Jerry G.

This is most likely a degausing circuit problem. Check the
thermosistor, and related circuits.

Jerry G.