DM800 HD PVR won't scan channels

i try every possible way.

all images almost all at this forum

i have another box. i try both tuner , M & L

i try both on other box both tuner works fine on SD channels, and scan and save services.

but this box is collect signal with sat finder. but when scan it never scan or save services.

now i conclude that main board is faulty. then i check voltage. not a big difference in voltages. all 3.3,1.3,5,12 volts are coming to tuner.

Quote from teak-won-do

the tuner is set correctly

try a different power supply

yes i also do that. i try a supply with 12V 2Amp . because normal supply has 12V 1Amp. but same....