A fault occurs in the remote power supply or system control section. Check the remote power supply IC803 (AN78M05) pin without 5V output, the foot is also without 9V input, indicating the power conversion before the 5V regulator in the power supply part. This machine a power conversion part by Q881 2SC4004 sampling control the damage of the Q882 2SD965 tube, replacing the two tube boot failure no change, further examination, found that the resistance of R885 has from 15 K increased to about 200K, replace the resistance after troubleshooting.