Since your Bosch dishwasher, model SHE4AP06UC/06, originally had just the Wash button light illuminated, and now has no lights at all after replacing the control panel, I would hold off on ordering any more parts until we check a couple of things.
The problem could be with the main control board, the wiring between the control board and control panel, or the incoming power supply.
The first thing I would check is whether the dishwasher is receiving power and whether the replacement control panel is properly connected.
Step 1: Check the incoming power
1. Turn off the dishwasher's circuit breaker.
2. Check the dishwasher's electrical junction box, usually located behind the lower access panel.
3. Look for loose connections, damaged wires, or overheated wire connectors.
4. With the connections safely enclosed and power restored, a qualified person can check for approximately 120 VAC between hot and neutral.
If you don't have 120 volts, the problem is with the incoming electrical supply rather than the control panel.
Safety: Turn off the breaker before opening electrical compartments or disconnecting wiring. Live voltage testing should only be performed by someone comfortable and qualified to work around energized electrical components.
Step 2: Recheck the new control panel
Since you lost all the indicator lights after replacing the panel, this is particularly important.
1. Turn off the breaker.
2. Open the door and inspect the wiring connections between the replacement control panel and the electronic control.
3. Make sure each connector is fully seated and no terminals are bent, damaged, or pushed back.
4. Compare the new panel's part number with the original to confirm compatibility with the complete model number, including /06.
5. If you still have the original panel, consider reconnecting it temporarily.
If the original Wash button light comes back on, that would suggest a problem with the replacement panel, its compatibility, or its connection.
If both panels are completely dead, we need to look more closely at the main control and its power supply.
Step 3: Check the On/Off switch and main power module
This Bosch uses a separate On/Off switch circuit and electronic power module. The service information identifies separate wiring connections for the On/Off switch and display assembly.
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With power disconnected:
1. Inspect the On/Off switch and its wiring harness.
2. Check whether the switch changes continuity when operated, using the correct switch terminals.
3. Inspect the power module's connectors for loose wires, corrosion, or overheating.
4. If the incoming 120 VAC supply and switch circuit are good, have a qualified technician verify power at the module's specified input terminals.
If proper power reaches the module, the On/Off switch and wiring are working, but the control panel remains dead, the main power module becomes the leading suspect.
For this model, Bosch power module 00701523 has been identified in a similar no-start troubleshooting case. However, I would verify the current replacement part number before ordering.
Appliance Parts Pros
What I recommend next
Because replacing the control panel made the lights disappear completely, I would first reconnect the original panel and see whether the Wash light returns. That is a useful test before spending more money.
I have two quick questions:
1. When you say you replaced the control panel, did you replace just the front button/display assembly, or the electronic control module?
2. With the original panel installed, was the Wash light illuminated continuously, or was it flashing?
Those two details will help us determine whether to concentrate on the On/Off switch, the replacement panel, or the main power module.