According to the meaning of the machine fault code table that H05 don't suck, and bad for the relays or mains voltage measuring resistance.
 
Boot check, machine brushed white paint the back plate. Measuring two 560 k Ω high pressure measuring resistance not seen. Connected to the relay coil is 750 Ω, resistance, on the original resistance and a 1.1 k Ω resistance, or don't suck. Measuring coil control triode is good; Repair welding of the CPU and other components is invalid; Answer the relay coil directly with 12 v power supply, relay can suck, normally open contact resistance measurement is zero, relay is good. Then the panel would not show. Don't connect power to the CPU directly hit bad? Electrical commissioning on display. The CPU is not bad, show by the CPU control. After measuring, close to the relay control transistor flank of a transistor A1309 breakdown. With same model change, there is, according to the machine according to the power supply, not listed electric power on the machine comes with 3 v lithium battery power supply, electrical commissioning and no shows, however, that there are failures. After check, found that the secondary power supply board near A1309 beside a zener diode triode leakage. With 51 on the diode, the estimate is 5.1 V, 5.1 V for not stabilivolt, so try to use 6.8 V, after everything is normal.