Check press any key the remote control is in normal working conditions the second boot, native volume keys will be able to enter the mill "sub menu 2" press the other keys can change the parameters.

Seen from the phenomenon of control circuit or multi-CPU and memory failures, according to our normal logic is removed for repairs. But and didn't immediately overhaul but analysis thinking has about, entered factory mode is through remote control issued instruction entered of, suspected for remote control fault, user reflect battery has replaced new battery, and remote control touch points spring no rust also no electrolytic liquid of situation Xia, still also suspected remote control, split Hou cover found whole remote control IC was electrolytic liquid soaking with, so with alcohol will its wash NET, hair dryer blow dry Hou loaded Shang battery, will TV exit factory menu each function normal, due to appeared fault Shi user will some parameter adjustable mess, Enter factory menu parameter values,
Exit test machine everything was normal.
And don't hurry power repair repair, and sometimes extend thinking about, perhaps can have unexpected results.