Indicator light flashing, that power should be normal, doubt is data or DG board power supply problems. Should first check the DG plate of each IC in the working state is normal, whether the crystals have normal work. utdservice manual download site
Check the CPU IC1104 power supply, cable and reset circuit is normal, check again IC4054 IC4057 / IC4055 power supply voltage, when detected IC4057 power supply circuit, found L4058 no 1.8 V voltage. Replace the L4054 troubleshooting. L4054 open, make IC4057 no 1.8 V working voltage caused by the fault.utdservice manual download site