SPS4243, HPS4253,
HPS5053
Chassis D75A Cadillac
SUBJECT: No turn on.
SYMPTOM: The unit will not turn on. When the POWER button is pressed the
relay clicks on – off – on – off…
REPAIR: Check for 5Vdc on pin 10 of CN804-1 (STB-5V). If the voltage level is
correct replace the Main PCB. If the voltage level is low then replace the SMPS
PCB.
