Hello! Bought Mso5072 firmware was 00.01.02. 00.03, when measuring in signal mode sinus with a voltage of 0.5 volts, the probe x10 after pressing the auto button oscillograph can not synchronize the signal, installed firmware ..... 08 opened all the options, calibrated, the problem is the same. If I switch the probe x1 there are no problems with synchronization. I still have dso4102c there all right... The seller offers to return the oscillograph, can I fix it myself?