I have a Bosch SHP865WD5N/10 dishwasher where the control panel/button board stopped responding after a circulation pump replacement (Part #: 12008381 (AP5984938)). I need help troubleshooting before I condemn any parts.
What I’ve done so far:
Confirmed via brown wire pair that power is reaching the control/button panel, and if on/off button is held depressed I am able to trace power back to the computer board in the base of the machine
All connectors throughout the entire unit triple checked and verified seated
Breaker reset performed multiple times, including 30+ minute extra wait
Base pan inspected — completely dry, no water intrusion
Flood sensor float tested — manually triggering it activates the drain pump, confirming the main control board has power
Made sure door was open when checking to see if control button board would light up, which is does not
OTHER:
Child lock concept has not been ruled out, robots online tell me about it but I don’t know where to find it
This unit has no fuses per Bosch technician documentation
Current symptoms:
Control panel completely unresponsive — no display, no button response
Unit was electrically operational before the pump replacement
My question: Before I consider replacing any computer boards, what additional troubleshooting steps should I take? Is there a diagnostic mode, reset sequence, or anything else I should check on this specific model?
As there is voltage reaching the power switch and going back to the power control module, the next step would be identifying if the power module is sending voltage to the user interface. At connection 11 there is a 4 wire connector with red wires. With the black meter probe placed at the red wire on pin 4, the red probe can be placed at the red wire at pin 1 and pin 2. There should be about 13.5 Volts DC. If there is not enough room to get to the red wires, they can be tested at the user interface if extreme care is taken to prevent any wire damage from the interface falling. If the interface is used for testing, it will be tested using the black meter probe at the red wire at pin 4. The red meter probe will go to the red wires at pin 6 and pin 7. Is the voltage present when the power switch is set to on?
If there is a proper 120 Volts AC reaching the appliance, the power control module should be sending voltage out of connection 11 when the on/off signal voltage loops back to the module. Since it is not sending voltage when it should, the power module has a failure within it. 12016882 Program Power Control Module | Genuine Bosch OEM In Stock
Ah ok , I didn’t try cycling the power button on this test, was just looking for voltage out of clip 11 - double checked that and confirmed no voltage change at clip 11 while cycling power button - will get a new brain shipped out now. Thanks for the help!